input: 1; output: 2; expressions: @"1B @"00 ^(@"1B)<1,> @"1B => "\UseMemUnichar{" \(*+2-1) "}"; @"00-@"7F => \1; (@"C0-@"DF)(@"80-@"BF) => #(((\1-@"C0)*@"40) + (\2-@"80)); (@"E0-@"EF)(@"80-@"BF)(@"80-@"BF) => #(((\1-@"E0)*@"1000) + ((\2-@"80)*@"40) + (\3-@"80)); . => @"FFFD;