#include<bits/stdc++.h>
using namespace std;

#define int long long

#define rep(i,n) for(int i=0;i<(n);i++)
#define pb push_back
#define all(v) (v).begin(),(v).end()
#define fi first
#define se second
typedef vector<int>vint;
typedef pair<int,int>pint;
typedef vector<pint>vpint;

template<typename A,typename B>inline void chmin(A &a,B b){if(a>b)a=b;}
template<typename A,typename B>inline void chmax(A &a,B b){if(a<b)a=b;}

char c[3];

signed main(){
    rep(i,3)cin>>c[i];
    int pos=find(c,c+3,'?')-c;
    for(int i=1;i<=4;i+=3){
        c[pos]=i+'0';

        if((c[1]>c[0]&&c[1]>c[2])||(c[1]<c[0]&&c[1]<c[2]))cout<<i;
    }cout<<endl;
    return 0;
}