nvn [ [ nvn
P XFRO XFST WFRO WFST
Q POFPT POFRO XFTO POFOT
3 PPFOO PPFPT POFRT POFTO
S PPFST PQFOO PPFQO PPFRT
T PRFRO PRFST PRFOO PRFPT
U PTFQO PTFRT PTFOO PTFPT
V PUFOT PUFQO PTFST PUFOO
W PVFOO PVFPT PUFRO PUFST