
for x in range(2,11,2):
    print (x)

for x in range(3,21,3):
    print (x)

for x in range(4, 24, 4):
    print(x)

for x in range(12,72,12):
    print (x)

# nested loop sample
for y in range(10,21):
    for z in range(1,21):
        print(z * y,end ='\t')
    print()
