public static boolean isChokugo ( String s ) {
  boolean res = true ;
  for ( int i = 0 ;
  i < s . length ( ) ;
  i ++ ) {
    if ( s . charAt ( i ) == 'c' && s . charAt ( i + 1 ) == 'h' ) {
      i ++ ;
    }
    else if ( s . charAt ( i ) != 'o' && s . charAt ( i ) != 'k' && s . charAt ( i ) != 'u' ) {
      res = false ;
      break ;
    }
  }
  return res ;
}

public static boolean isChokugo ( String s ) { boolean res = true ; for ( int i = 0 ; i < s . length ( ) ; i ++ ) { if ( s . charAt ( i ) == ' c ' && s . charAt ( i + 1 ) == ' h ' ) { i ++ ; } else if ( s . charAt ( i ) != ' o ' && s . charAt ( i ) != ' k ' && s . charAt ( i ) != ' u ' ) { res = false ; break ; } } return res ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier))) body: (block (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (true))) (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 (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 (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (character_literal)))) consequence: (block (expression_statement (update_expression (identifier)))) alternative: (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 (expression_statement (assignment_expression left: (identifier) right: (false))) (break_statement)))))) (return_statement (identifier))))