c

#include<bits/stdc++.h>

using namespace std;

typedef long long LL;
const int maxn = 1e4 + 1;
vector<int> S(maxn, 0), No(maxn, 0), U(maxn, 0);
map<string, string> S2No, No2S;

int main() {
    string a, op, b;
    while(cin >> a && a != "-1"){
        cin >> op >> b;
        if(a[0] == 'S') {
            if(op == "bind"){
                if(!S2No.count(a) && !No2S.count(b)){
                    printf("%s bind success\n", a.c_str());
                    S2No[a] = b;
                    No2S[b] = a;
                    continue;
                } else {
                    printf("%s bind fail\n", a.c_str());
                    continue;
                }
            } else if (op == "unbind"){
                if(S2No.count(a) && S2No[a] == b && No2S.count(b) && No2S[b] == a){
                    printf("%s unbind success\n", a.c_str());
                    S2No.erase(a);
                    No2S.erase(b);
                    continue;
                } else {
                    printf("%s unbind fail\n", a.c_str());
                    continue;
                }
            } else {
                printf("unknow command\n");
                continue;
            }
        } else if (a[0] == 'U') {
            if(op == "scan"){
                if(No2S.count(b)){
                    printf("%s pay to %s\n", a.c_str(), No2S[b].c_str());
                    continue;
                } else {
                    printf("%s scan fail\n", a.c_str());
                    continue;
                }
            } else {
                printf("unknow command\n");
                continue;
            }
        }
    }
    return 0;
}