#include <stdio.h>
int main()
{
    char section,bloodgrp;
    int rollnum;
    scanf("%c",&section);
    scanf("%d",&rollnum);
    scanf("%c",&bloodgrp);
    if
    (((section>=A && section<=Z)&&(rollnum>=1 && rollnum<=9)&&(bloodgrp ==A || bloodgrp==B || bloodgrp==O));
     printf("%c",section);
     printf("%d",rollnum);
     printf("%c",bloodgrp);)
}