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#!/usr/bin/pythonrngmin1 = 1rngmax1 = 2rngmin2 = 0rngmax2 = 9rngmin3 = 0rngmax3 = 9rngmin4 = 0rngmax4 = 9desired_total = 4x = []for a in range(rngmin1,rngmax1):  for b in range(rngmin2,rngmax2):    for c in range(rngmin3,rngmax3):      for d in range(rngmin4,rngmax4):        if (a+b+c+d) == desired_total:          x.append(int(str(a) + str(b) + str(c) + str(d)))print x