for i in range(1, 6):
    a = str(i).zfill(3)
    print(a)


i = 0
s = "abc"
for c in s:
    print(i, c)
    i += 1

for i, c in enumerate(s):
    print(i, c)

for i, c in enumerate(s, start=1):
    print(i, c)