#include<stdio.h>
int main()
{
    int RollNumber;
    char Section,BloodGroup;
    scanf("%c",&Section);
    scanf("%d",&RollNumber);
    scanf("%c",&BloodGroup);
    printf("Section:\n");
    printf("Roll Number:\n");
    printf("Blood Group:\n");
    isupper(Section);
    isdigit(RollNumber);
    isupper(BloodGroup);
    if(isalpha(Section))
    {
        printf("Section:%c",Section);
    }
    else if(RollNumber>=1 && RollNumber<10)
    {
        printf("\nRollNumber:%d",RollNumber);
    }
    else if(BloodGroup=='A'||BloodGorup=='B'||BloodGroup=='o')
    {
        printf("\nBloodGroup:%c",BloodGroup);
    }
    else
    {
        printf("Invalid input");
    }
}