F
f0000000000000000000000000000000
ff000000000000000000000000000000
fff00000000000000000000000000000
ffff0000000000000000000000000000
fffff000000000000000000000000000
ffffff00000000000000000000000000
fffffff0000000000000000000000000
ffffffff000000000000000000000000
fffffffff00000000000000000000000
ffffffffff0000000000000000000000
fffffffffff000000000000000000000
ffffffffffff00000000000000000000
fffffffffffff0000000000000000000
ffffffffffffff000000000000000000
fffffffffffffff00000000000000000
ffffffffffffffff0000000000000000
