public static void main ( String [ ] args ) {
  Scanner in = new Scanner ( System . in ) ;
  String s = in . next ( ) ;
  int ans = 0 ;
  boolean gone = false ;
  for ( int i = 0 ;
  i < s . length ( ) ;
  i ++ ) {
    if ( i + 1 < s . length ( ) && s . charAt ( i ) == 'V' && s . charAt ( i + 1 ) == 'K' ) {
      i ++ ;
      ans ++ ;
    }
    else {
      if ( ! gone ) {
        if ( i == s . length ( ) - 2 && s . charAt ( i ) == 'V' && s . charAt ( i + 1 ) == 'V' ) {
          ans ++ ;
          break ;
        }
        else if ( i + 1 < s . length ( ) && i == 0 && s . charAt ( 0 ) == 'K' && s . charAt ( 1 ) == 'K' ) {
          ans ++ ;
          i ++ ;
          gone = true ;
        }
        else if ( i + 2 < s . length ( ) && s . charAt ( i ) == 'V' && s . charAt ( i + 1 ) == 'V' && s . charAt ( i + 2 ) == 'V' ) {
          ans ++ ;
          gone = true ;
        }
        else if ( i - 1 >= 0 && i + 1 < s . length ( ) && s . charAt ( i ) == 'K' && s . charAt ( i + 1 ) == 'K' && s . charAt ( i - 1 ) == 'K' ) {
          ans ++ ;
          gone = true ;
        }
      }
    }
  }
  println ( ans ) ;
}

public static void main ( String [ ] args ) { Scanner in = new Scanner ( System . in ) ; String s = in . next ( ) ; int ans = 0 ; boolean gone = false ; for ( int i = 0 ; i < s . length ( ) ; i ++ ) { if ( i + 1 < s . length ( ) && s . charAt ( i ) == ' V ' && s . charAt ( i + 1 ) == ' K ' ) { i ++ ; ans ++ ; } else { if ( ! gone ) { if ( i == s . length ( ) - 2 && s . charAt ( i ) == ' V ' && s . charAt ( i + 1 ) == ' V ' ) { ans ++ ; break ; } else if ( i + 1 < s . length ( ) && i == 0 && s . charAt ( 0 ) == ' K ' && s . charAt ( 1 ) == ' K ' ) { ans ++ ; i ++ ; gone = true ; } else if ( i + 2 < s . length ( ) && s . charAt ( i ) == ' V ' && s . charAt ( i + 1 ) == ' V ' && s . charAt ( i + 2 ) == ' V ' ) { ans ++ ; gone = true ; } else if ( i - 1 >= 0 && i + 1 < s . length ( ) && s . charAt ( i ) == ' K ' && s . charAt ( i + 1 ) == ' K ' && s . charAt ( i - 1 ) == ' K ' ) { ans ++ ; gone = true ; } } } } println ( ans ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (false))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (character_literal)))) consequence: (block (expression_statement (update_expression (identifier))) (expression_statement (update_expression (identifier)))) alternative: (block (if_statement condition: (parenthesized_expression (unary_expression operand: (identifier))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (decimal_integer_literal))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (character_literal)))) consequence: (block (expression_statement (update_expression (identifier))) (break_statement)) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))) right: (character_literal))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))) right: (character_literal)))) consequence: (block (expression_statement (update_expression (identifier))) (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (identifier) right: (true)))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (character_literal))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (character_literal)))) consequence: (block (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (identifier) right: (true)))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (character_literal))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (character_literal)))) consequence: (block (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (identifier) right: (true)))))))))))))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier))))))