1 2 3 4 5 6 7 8 9 10 11 12
#!/usr/bin/env python from itertools import groupby digits = "1113122113" for i in range(50): digits = ''.join(str(len(list(g))) + str(k) for k, g in groupby(digits)) if i == 39: print(len(digits)) print(len(digits))