i = 0
while i < 10:
    print(i)
    i+=1

i = 10
while i > 0:
    print(i)
    i-=2

i = 0
while True:
    if i > 3:
        break
    print(i)
    i+=1

i = 0
while i < 10:
    i+=1
    if i == 4:
        continue
    print(i)