#include <stdio.h>
#include <ctype.h>

int main()
{
	char ch;

	while( (ch = fgetc(stdin)) != EOF)
	{
		if(isalpha(ch))
		{
			if(toupper(ch)>='A' && toupper(ch)<='M')
				ch += 13;
			else
				ch -= 13;
		}
		fputc(ch,stdout);
	}
	return(0);
}