use rot0;
rotbynum("QRSTUVWXYZ 1 2 3 blah qrxtuvwxyz.", 8);
rotbynum("YZABCDEFGH 1 2 3 jtip yzfbcdefgh.", -8);
rotbynum("howaretheselinesdifferent", 8);
rotbynum("thisistheonlytimeiwillusehisnumber", 13);
rotbynum("pweizmbpmamtqvmalqnnmzmvb", -8);
rotbynum("guvfvfgurbaylgvzrvjvyyhfruvfahzore", 13);
rotbynum("erozhafvurfhyyvjvrzvglyabrugfvfvug", 13);
rotbynum("vmmbzqpbaqzmjucvaqp", -8);
rotbynum("thereare1e100waystofindwhatyouneed", 8);
rotbynum("bpmzmizm1m100eigabwnqvlepibgwcvmml", -8);