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#include <iostream>
#include <string>
#include <vector>
#include <utility>
#include <map>
using namespace std;
void goo() {
    string s;
    vector<string> stk;
    for(;;) {
        cin >> s;
        if(s=="(") stk.push_back(s);
        else if(s==")") {
            stk.pop_back();
            if(stk.empty()) return;
        } else if(stk.empty()) {
            if(s[0]>='0'&&s[0]<='9') {
                return ;
            } else if(s=="true" || s=="false") {
                return ;
            } else if(s!="if"&&s!="let") {
                return;
            }
        }
    }
    return ;
}
map<string,vector<pair<int,string> > > vars;
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