public static void main ( String arg [ ] ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int m = sc . nextInt ( ) ;
  char [ ] [ ] ar1 = new char [ n ] [ m ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    char [ ] line = sc . next ( ) . toCharArray ( ) ;
    for ( int j = 0 ;
    j < m ;
    j ++ ) {
      ar1 [ i ] [ j ] = line [ j ] ;
    }
  }
  int res = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    for ( int j = 0 ;
    j < m ;
    j ++ ) {
      if ( ar1 [ i ] [ j ] == 'W' ) {
        if ( j - 1 >= 0 && ar1 [ i ] [ j - 1 ] == 'P' ) {
          ar1 [ i ] [ j - 1 ] = '.' ;
          res ++ ;
        }
        else if ( i - 1 >= 0 && ar1 [ i - 1 ] [ j ] == 'P' ) {
          ar1 [ i - 1 ] [ j ] = '.' ;
          res ++ ;
        }
        else if ( j + 1 < m && ar1 [ i ] [ j + 1 ] == 'P' ) {
          ar1 [ i ] [ j + 1 ] = '.' ;
          res ++ ;
        }
        else if ( i + 1 < n && ar1 [ i + 1 ] [ j ] == 'P' ) {
          ar1 [ i + 1 ] [ j ] = '.' ;
          res ++ ;
        }
      }
    }
  }
  System . out . println ( res ) ;
}

public static void main ( String arg [ ] ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int m = sc . nextInt ( ) ; char [ ] [ ] ar1 = new char [ n ] [ m ] ; for ( int i = 0 ; i < n ; i ++ ) { char [ ] line = sc . next ( ) . toCharArray ( ) ; for ( int j = 0 ; j < m ; j ++ ) { ar1 [ i ] [ j ] = line [ j ] ; } } int res = 0 ; for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < m ; j ++ ) { if ( ar1 [ i ] [ j ] == ' W ' ) { if ( j - 1 >= 0 && ar1 [ i ] [ j - 1 ] == ' P ' ) { ar1 [ i ] [ j - 1 ] = ' . ' ; res ++ ; } else if ( i - 1 >= 0 && ar1 [ i - 1 ] [ j ] == ' P ' ) { ar1 [ i - 1 ] [ j ] = ' . ' ; res ++ ; } else if ( j + 1 < m && ar1 [ i ] [ j + 1 ] == ' P ' ) { ar1 [ i ] [ j + 1 ] = ' . ' ; res ++ ; } else if ( i + 1 < n && ar1 [ i + 1 ] [ j ] == ' P ' ) { ar1 [ i + 1 ] [ j ] = ' . ' ; res ++ ; } } } } System . out . println ( res ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions))) 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)))) (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 (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list)))) (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: (array_access array: (identifier) index: (identifier)) index: (identifier)) right: (array_access array: (identifier) index: (identifier)))))))) (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: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (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 (assignment_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (character_literal))) (expression_statement (update_expression (identifier)))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (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 (assignment_expression left: (array_access array: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) index: (identifier)) right: (character_literal))) (expression_statement (update_expression (identifier)))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (identifier)) right: (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 (assignment_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (character_literal))) (expression_statement (update_expression (identifier)))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (identifier)) right: (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 (assignment_expression left: (array_access array: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) index: (identifier)) right: (character_literal))) (expression_statement (update_expression (identifier)))))))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))