#include <iostream>
#include <string>

using namespace std;

int main(){
    char S[10000];
    cin>>S;
    int i;
    int n;
    int ans=0;
    for(i=0;i>=10000;i++){
    if(S[i]>=48&&S[i]<=57){
        n=S[i]-48;
        ans+=n;
    }
    if(S[i]==0){
        break;
    }
        
    }
    cout<<S;
}