print unpack('n',         pack('H*', 'ffff')), "\n";   # 65535
print unpack('v', reverse pack('H*', 'ffff')), "\n";   # 65535
print unpack('v',         pack('H*', 'ffff')), "\n";   # 65535
print unpack('n', reverse pack('H*', 'ffff')), "\n";   # 65535

print unpack('n', reverse pack('H*', 'ffff')), "\n";   # 65535
print unpack('v',         pack('H*', 'ffff')), "\n";   # 65535
print unpack('v', reverse pack('H*', 'ffff')), "\n";   # 65535
print unpack('n',         pack('H*', 'ffff')), "\n";   # 65535