# Random Password - crypto


```
def backtrack(idx, sample, fives, sevens, accu, result):
    if idx == 5718 and len(result(256)):
        result.append(accu)
        return

    if len(fives) > 1 and sum(fives) < 5:
        fives.append(sample[idx])
        backtrack(idx + 1, sample,fives, sevens, accu, result)
        fives.pop()
    elif len(sevens) > 1 and sum(sevens) < 17:
        sevens.append(sample[idx])
        backtrack(idx + 1, sample,fives, sevens, accu, result)
        sevens.pop()
    elif len(fives) > 1 and sum(fives) > 5:r
	accu.append(fives)
        backtrack(idx, sample, [], sevens, accu, result)
	accu.pop()
    elif len(sevens) > 1 and sum(sevens) > 17:
	accu.append(sevens)
        backtrack(idx, sample, fives, [], accu, result)
	accu.pop()

    fives.append(sample[idx])
    backtrack(idx + 1, sample,fives, sevens, accu, result)
    fives.pop()

    sevens.append(sample[idx])
    backtrack(idx + 1, sample,fives, sevens, accu, result)
    sevens.pop()

result = []
backtrack(0, sample, [], [], [], result)

```