pragma solidity 0.4.24;


contract Crontab {

    byte constant STAR = '*';
    uint256 t_days;
    uint256 t_months;
    uint256 t_years;

    constructor (uint256 _t_days, uint256 _t_months, uint256  _t_years) {

    }

    // 1 -- Return 

    function height() public view returns (uint256) {

    }



}