public static void main ( String [ ] args ) {
  Scanner scanner = new Scanner ( System . in ) ;
  while ( scanner . hasNext ( ) ) {
    String [ ] s = scanner . next ( ) . split ( ":" ) ;
    int h = Integer . parseInt ( s [ 0 ] ) ;
    int m = Integer . parseInt ( s [ 1 ] ) ;
    while ( true ) {
      m ++ ;
      h += m / 60 ;
      m %= 60 ;
      h %= 24 ;
      if ( h / 10 == m % 10 && h % 10 == m / 10 ) break ;
    }
    System . out . print ( h / 10 ) ;
    System . out . print ( h % 10 ) ;
    System . out . print ( ":" ) ;
    System . out . print ( m / 10 ) ;
    System . out . println ( m % 10 ) ;
  }
}

public static void main ( String [ ] args ) { Scanner scanner = new Scanner ( System . in ) ; while ( scanner . hasNext ( ) ) { String [ ] s = scanner . next ( ) . split ( " : " ) ; int h = Integer . parseInt ( s [ 0 ] ) ; int m = Integer . parseInt ( s [ 1 ] ) ; while ( true ) { m ++ ; h += m / 60 ; m %= 60 ; h %= 24 ; if ( h / 10 == m % 10 && h % 10 == m / 10 ) break ; } System . out . print ( h / 10 ) ; System . out . print ( h % 10 ) ; System . out . print ( " : " ) ; System . out . print ( m / 10 ) ; System . out . println ( m % 10 ) ; } }
(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)))))) (while_statement condition: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) body: (block (local_variable_declaration type: (array_type element: (type_identifier) 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 (string_literal))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (decimal_integer_literal)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (decimal_integer_literal)))))) (while_statement condition: (parenthesized_expression (true)) body: (block (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))) consequence: (break_statement)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))))))))