#include <iostream>
using namespace std;
int main()
{
    
    char q,w,e,r,t,y,u,i,o,p,a,s,d,f,g,h,j,k,l,z,x,c,v,b,n,m;
    char sum;
    cin>>q>>w>>e>>r>>t>>y>>u>>i>>o>>p>>a>>s>>d>>f>>g>>h>>j>>k>>l>>z>>x>>c>>v>>b>>n>>m>>sum;
    if(char(sum = q)) cout<<'Q'<<endl;
    else if(char(sum = w)) cout<<'W'<<endl;
    else if(char(sum = e)) cout<<'E'<<endl;
    else if(char(sum = r)) cout<<'R'<<endl;
    else if(char(sum = t)) cout<<'T'<<endl;
    else if(char(sum = y)) cout<<'Y'<<endl;
    else if(char(sum = u)) cout<<'U'<<endl;
    else if(char(sum = i)) cout<<'I'<<endl;
    else if(char(sum = o)) cout<<'O'<<endl;
    else if(char(sum = p)) cout<<'P'<<endl;
    else if(char(sum = a)) cout<<'A'<<endl;
    else if(char(sum = s)) cout<<'S'<<endl;
    else if(char(sum = d)) cout<<'D'<<endl;
    else if(char(sum = f)) cout<<'F'<<endl;
    else if(char(sum = g)) cout<<'G'<<endl;
    else if(char(sum = h)) cout<<'H'<<endl;
    else if(char(sum = j)) cout<<'J'<<endl;
    else if(char(sum = k)) cout<<'K'<<endl;
    else if(char(sum = l)) cout<<'L'<<endl;
    else if(char(sum = z)) cout<<'Z'<<endl;
    else if(char(sum = x)) cout<<'X'<<endl;
    else if(char(sum = c)) cout<<'C'<<endl;
    else if(char(sum = v)) cout<<'V'<<endl;
    else if(char(sum = b)) cout<<'B'<<endl;
    else if(char(sum = n)) cout<<'N'<<endl;
    else if(char(sum = m)) cout<<'M'<<endl;
    return 0;
}