#include <stdio.h> /*ASCII rot13. Gives no errors with 'gcc -Wall'*/
int main(){int c;int r=13;while((c=getchar())!=EOF){if((c>='A'&&c<=(
'A'+26-r-1))||(c>='a'&&c<=('a'+26-r-1)))c=c+r;else if((c>=('A'+26-r)
&&c<='Z')||(c>=('a'+26-r)&&c<='z'))c=c-(26-r);putchar(c);}return 0;}