#include "stdio.h"
#include "string.h"
main()
{
char BH[2][10] ={ "aaa","bbb"};
char ZD[2][10] = {{"a","s","d"},{"c";"d","w"}};
char tmp[10];
int ptr;
scanf("%s",tmp);
for(i=0;i<2;i++)
{
ptr = strcmp(tmp, BH[i]);
if(ptr==0)
break;
}
printf("%s",ZD[i]);
}