ਇੱਕੀ (ikkī) - twenty-one
ਬਾਈ (bāī) - twenty-two
ਤੇਈ (teī) - twenty-three
ਚੌਵੀ (cauvī) - twenty-four
ਪੰਝੀ (paṃjhī) - twenty-five
ਛੱਬੀ (chabbī) - twenty-six
ਸਤਾਈ (satāī) - twenty-seven
ਅਠਾਈ (aṭāī) - twenty-eight
ਉਨੱਤਈ (unattī) - twenty-nine
ਤੀਹ (tīh) - thirty
ਇੱਕਤੀ (ikkatī) - thirty-one
How did I develop this? (1) I used Punjabi-English/English-Punjabi Dictionary and (2) Teach Yourself Panjabi.