public static void main ( String [ ] args ) {
  Scanner input = new Scanner ( System . in ) ;
  String string = input . nextLine ( ) ;
  char first = ' ' ;
  int counter = 0 ;
  for ( char b : string . toCharArray ( ) ) {
    if ( first == ' ' ) {
      first = b ;
    }
    else {
      if ( b == first ) {
      }
      else {
        first = b ;
        counter ++ ;
      }
    }
  }
  System . out . println ( counter ) ;
}

public static void main ( String [ ] args ) { Scanner input = new Scanner ( System . in ) ; String string = input . nextLine ( ) ; char first = ' ▁ ' ; int counter = 0 ; for ( char b : string . toCharArray ( ) ) { if ( first == ' ▁ ' ) { first = b ; } else { if ( b == first ) { } else { first = b ; counter ++ ; } } } System . out . println ( counter ) ; }
(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: (character_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (enhanced_for_statement type: (integral_type) name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (character_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (identifier)))) alternative: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))) (expression_statement (update_expression (identifier))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))