#include<stdio.h>
int main()
{
char o,y,r,a;
o=o+1;
y=y+1;
r=r+1;
a=a+1;
printf("%c%c%c%c\n",o,y,r,a);
return 0;
}
o='o'+1;
y='y'+1;
r='r'+1;
a='a'+1;