public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  String X = sc . next ( ) ;
  int ngs = X . length ( ) ;
  if ( ngs == 0 ) {
    System . out . println ( "YES" ) ;
    System . exit ( 0 ) ;
  }
  int cnt = 0 ;
  for ( cnt = 0 ;
  cnt < ngs ;
  cnt ++ ) {
    if ( X . charAt ( cnt ) == 'o' || X . charAt ( cnt ) == 'k' || X . charAt ( cnt ) == 'u' ) {
    }
    else if ( X . charAt ( cnt ) == 'c' ) {
      if ( X . charAt ( cnt + 1 ) == 'h' ) {
        cnt ++ ;
      }
      else {
        System . out . println ( "NO" ) ;
        System . exit ( 0 ) ;
      }
    }
    else {
      System . out . println ( "NO" ) ;
      System . exit ( 0 ) ;
    }
  }
  System . out . println ( "YES" ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; String X = sc . next ( ) ; int ngs = X . length ( ) ; if ( ngs == 0 ) { System . out . println ( " YES " ) ; System . exit ( 0 ) ; } int cnt = 0 ; for ( cnt = 0 ; cnt < ngs ; cnt ++ ) { if ( X . charAt ( cnt ) == ' o ' || X . charAt ( cnt ) == ' k ' || X . charAt ( cnt ) == ' u ' ) { } else if ( X . charAt ( cnt ) == ' c ' ) { if ( X . charAt ( cnt + 1 ) == ' h ' ) { cnt ++ ; } else { System . out . println ( " NO " ) ; System . exit ( 0 ) ; } } else { System . out . println ( " NO " ) ; System . exit ( 0 ) ; } } System . out . println ( " YES " ) ; }
(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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (assignment_expression left: (identifier) right: (decimal_integer_literal)) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (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 (identifier))) right: (character_literal))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal)))) consequence: (block) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) consequence: (block (if_statement condition: (parenthesized_expression (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)))) alternative: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))))))) alternative: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))))