n is 1
n is 2
n mod 100 is 1
n mod 100 is 2
n mod 100 in 3..4
n mod 10 is 1
n mod 10 is 2
n mod 10 in 3..4
n is 1
n is 2
n is 11
n is 12
n in 3..10 or n in 13..19
n is 1