dohod = 5000
procent = - 0.20
dohod += dohod * procent
i = 0
a = dohod
while i < 12:
    i += 1
    print(i, a)
    a = a + dohod
print(a) 
  dohod = 5000
procent = - 0.20
dohod += dohod * procent
i = 0
a = dohod
while True:
    i += 1
    print(i, a)
    if i == 12:
        break
    a = a + dohod
print(a)