wwwn7 vwwn uwwn71 twwn7 swwn
75vn 65vn71 55vn7 45vn 35vn71
ifvn71 hfvn7 gfvn ffvn71 efvn7
toun7 soun roun71 qoun7 poun
4xtn 3xtn71 2xtn7 1xtn 0xtn71