docs: def show_kmatrix(km):
      '''
          d = {1: {2: {22: 222}}, 3: {'a': 'b'}}
          km = [[[1], [3]], [[1, 2], [3, 'a']], [[1, 2, 22]]]
          show_kmatrix(km)
      '''
      rslt = []
      for i in range(0,km.__len__()):
          level = km[i]
          for j in range(0,level.__len__()):
              kpl = level[j]
              print(kpl)
              rslt.append(kpl)
      return(rslt)