public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int m = sc . nextInt ( ) ;
  sc . nextLine ( ) ;
  char [ ] [ ] mat = new char [ n ] [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    mat [ i ] = ( sc . nextLine ( ) ) . toCharArray ( ) ;
  }
  int count = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    for ( int j = 0 ;
    j < m ;
    j ++ ) {
      if ( mat [ i ] [ j ] == 'P' ) {
        if ( i > 0 ) {
          if ( mat [ i - 1 ] [ j ] == 'W' ) {
            count ++ ;
            mat [ i - 1 ] [ j ] = '.' ;
            continue ;
          }
        }
        if ( i < n - 1 ) {
          if ( mat [ i + 1 ] [ j ] == 'W' ) {
            count ++ ;
            mat [ i + 1 ] [ j ] = '.' ;
            continue ;
          }
        }
        if ( j > 0 ) {
          if ( mat [ i ] [ j - 1 ] == 'W' ) {
            count ++ ;
            mat [ i ] [ j - 1 ] = '.' ;
            continue ;
          }
        }
        if ( j < m - 1 ) {
          if ( mat [ i ] [ j + 1 ] == 'W' ) {
            count ++ ;
            mat [ i ] [ j + 1 ] = '.' ;
            continue ;
          }
        }
      }
    }
  }
  System . out . println ( count ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int m = sc . nextInt ( ) ; sc . nextLine ( ) ; char [ ] [ ] mat = new char [ n ] [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { mat [ i ] = ( sc . nextLine ( ) ) . toCharArray ( ) ; } int count = 0 ; for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < m ; j ++ ) { if ( mat [ i ] [ j ] == ' P ' ) { if ( i > 0 ) { if ( mat [ i - 1 ] [ j ] == ' W ' ) { count ++ ; mat [ i - 1 ] [ j ] = ' . ' ; continue ; } } if ( i < n - 1 ) { if ( mat [ i + 1 ] [ j ] == ' W ' ) { count ++ ; mat [ i + 1 ] [ j ] = ' . ' ; continue ; } } if ( j > 0 ) { if ( mat [ i ] [ j - 1 ] == ' W ' ) { count ++ ; mat [ i ] [ j - 1 ] = ' . ' ; continue ; } } if ( j < m - 1 ) { if ( mat [ i ] [ j + 1 ] == ' W ' ) { count ++ ; mat [ i ] [ j + 1 ] = ' . ' ; continue ; } } } } } System . out . println ( count ) ; }
(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: (integral_type) 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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier)) dimensions: (dimensions_expr (identifier))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) name: (identifier) arguments: (argument_list)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier)) right: (character_literal))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) index: (identifier)) right: (character_literal))) consequence: (block (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (array_access array: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) index: (identifier)) right: (character_literal))) (continue_statement))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) index: (identifier)) right: (character_literal))) consequence: (block (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (array_access array: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) index: (identifier)) right: (character_literal))) (continue_statement))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (character_literal))) consequence: (block (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (character_literal))) (continue_statement))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (character_literal))) consequence: (block (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (character_literal))) (continue_statement))))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))