codePIN = "0102"
for a in range (9):
    if a == int(codePIN[0]):
        print(a)
for b in range(9):
    if b == int(codePIN[1]):
        print(b)
for c in range(9):
    if c == int(codePIN[2]):
        print(c)
for d in range(9):
    if d == int(codePIN[3]):
        print(d)