buildings = ["A", "B", "C", "D", "E"]
levels = ["1", "2", "3", "4", "5", "6", "7"]
disciplines = ["H", "V", "K", "M"]
Tab = list()
for building in buildings :
  for level in levels :
    for discipline in disciplines :
      a = building
      b = level
      c = discipline
      d = a + b + c
      Tab.append(d)

for element in Tab :
  print (element)