nvn [ [ nvn
P WFRO WFST XFOO XFPT
Q XFRO XFST XFTO POFOT
3 POFPT POFRO POFRT POFTO
S PPFOO PPFPT PPFQO PPFRT
T PPFST PQFOO PRFOO PRFPT
U PRFRO PRFST PSFOO PSFPT
V PSFQO PSFRT PSFST PTFOO
W PTFOT PTFQO PTFRO PTFST
X PTFTO PUFOT PUFPT PUFRO
PO PUFRT PUFTO PVFOO PVGPT
PP PVGQO PVFRT PVFST PWFOO