let ds = (time.match(/m/g)||[]).length;
let hs = (time.match(/h/g)||[]).length;
let ms = (time.match(/m/g)||[]).length;
if (ds > 1) console.log("You can't have more than 1 occurance of 'd'");
if (hs > 1) console.log("You can't have more than 1 occurance of 'h'");
if (ms > 1) console.log("You can't have more than 1 occurance of 'm'");