#include <stdio.h>
int main(void)
{
    char c;
    int i,n;
 scanf("%d", &n);
 for(i=0;i<n;i+=1)
 { 
  scanf("%c", &c);
        if((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'))
  {
   if(c >= '0' && c <= '9')
    printf("%c\n",c-'0');
      else if(c >= 'a' && c <= 'f')
                printf("%c\n",c-'a'+10);
   else if(c >= 'A' && c <= 'F')
    printf("%c\n",c-'A'+10);
   }
  else
   printf("%d\n",c);
 }
 return 0;
}
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