public static void main ( String [ ] args ) throws Exception {
  BufferedReader input = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  StringTokenizer tokenizer = new StringTokenizer ( input . readLine ( ) ) ;
  int a = Integer . parseInt ( tokenizer . nextToken ( ) ) ;
  int b = Integer . parseInt ( tokenizer . nextToken ( ) ) ;
  String word = input . readLine ( ) ;
  int size = 0 ;
  boolean correct = true ;
  boolean foundMinuse = false ;
  for ( int i = 0 ;
  i < word . length ( ) ;
  i ++ ) {
    if ( Character . isDigit ( word . charAt ( i ) ) ) {
      size ++ ;
    }
    else {
      if ( size != a ) {
        correct = false ;
        break ;
      }
      size = 0 ;
      foundMinuse = true ;
    }
  }
  if ( foundMinuse && size == b ) {
    System . out . println ( "Yes" ) ;
  }
  else {
    System . out . println ( "No" ) ;
  }
}

public static void main ( String [ ] args ) throws Exception { BufferedReader input = new BufferedReader ( new InputStreamReader ( System . in ) ) ; StringTokenizer tokenizer = new StringTokenizer ( input . readLine ( ) ) ; int a = Integer . parseInt ( tokenizer . nextToken ( ) ) ; int b = Integer . parseInt ( tokenizer . nextToken ( ) ) ; String word = input . readLine ( ) ; int size = 0 ; boolean correct = true ; boolean foundMinuse = false ; for ( int i = 0 ; i < word . length ( ) ; i ++ ) { if ( Character . isDigit ( word . charAt ( i ) ) ) { size ++ ; } else { if ( size != a ) { correct = false ; break ; } size = 0 ; foundMinuse = true ; } } if ( foundMinuse && size == b ) { System . out . println ( " Yes " ) ; } else { System . out . println ( " No " ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) (throws (type_identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (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: (object_creation_expression type: (type_identifier) arguments: (argument_list (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 (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 (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (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: (true))) (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 (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))) consequence: (block (expression_statement (update_expression (identifier)))) alternative: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (false))) (break_statement))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))) (expression_statement (assignment_expression left: (identifier) right: (true))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier)))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))) alternative: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))))))