#include<bits/stdc++.h>
using namespace std;
struct _array{
	string name;
	int size;
	int a[110]={0};
};
vector<_array> arr;
inline int powin10(int t){
	int tmp=1;
	while(t--) tmp*=10;
	return tmp;
}
int _stoi(string s){
	int sol=0;
	for(int i=s.size()-1,j=0;i>=(s[0]=='-');i--,j++) sol+=(s[i]-'0')*powin10(j);
	return (s[0]=='-'? -sol : sol);
}
bool isnum(string s){
	for(int i=0;i<s.size();i++) if(!(s[i]>='0'&&s[i]<='9')) return 0;
	return 1;
}
void outlist(){
	printf("outlist:\n");
	for(int i=0;i<arr.size();i++){
		cout<<arr[i].name<<"\t"<<arr[i].size;
		printf("\n\t");
		for(int j=0;j<arr[i].size;j++) printf("%d ",arr[i].a[j]);
		printf("\n");
	}
	printf("\n");
}
int find(string valuename){
	for(int i=0;i<arr.size();i++) if(arr[i].name==valuename) return i;
	return -1;
}
int getvalue(string expr){
	if(isnum(expr)) return _stoi(expr);
//	cout<<"expr="<<expr<<endl;
	string tmp="",name="";
	int p=0,o=expr.size()-1;
	while(expr[p]!='[') name+=expr[p],p++;
	if(find(name)==-1) return -1;
	p++;
	while(expr[o]!=']') o--;
	o--;
	for(int i=p;i<=o;i++) tmp+=expr[i];
//	cout<<name<<"\ttmp="<<tmp<<"\n";
	if(isnum(tmp)){
		if(_stoi(tmp)<0||_stoi(tmp)>=arr[find(name)].size) return -1;
//		printf("find(name)=%d\t_stoi(tmp)=%d\t%d\n",find(name),_stoi(tmp),arr[find(name)].a[_stoi(tmp)]);
		return arr[find(name)].a[_stoi(tmp)];
	}
	else{
		if(getvalue(tmp)<0||getvalue(tmp)>=arr[find(name)].size) return -1;
		return arr[find(name)].a[getvalue(tmp)];
	}
}
bool definition(string s){
	string tmp="",name="";
	int p=0;
	while(s[p]!='[') name+=s[p],p++;
	p++;
	while(s[p]!=']') tmp+=s[p],p++;
	if(isnum(tmp)){
		if(_stoi(tmp)==-1) return -1;
		arr.push_back({name,_stoi(tmp)});
	}else{
		if(getvalue(tmp)<0) return -1;
		arr.push_back({name,getvalue(tmp)});
	}
	return 1;
}
int main(){
	string cmd;
	while(getline(cin,cmd)){
		if(cmd.size()>5&&cmd.substr(0,4)=="int "){
			cmd.erase(0,4);
			if(definition(cmd)==-1) printf("-1\n"),exit(0);
		}else if(cmd.size()>6&&cmd.substr(0,5)=="cout "){
			cmd.erase(0,5);
			if(getvalue(cmd)==-1) printf("-1\n"),exit(0);
			printf("%d\n",getvalue(cmd));
		}else{
			if(cmd=="") exit(0);
			string name="",tmp="";
			int p=0,o=cmd.size()-1;
			while(cmd[p]!='[') name+=cmd[p],p++;
			p++;
			while(cmd[o]!=']') o--;
			o--;
			for(int i=p;i<=o;i++) tmp+=cmd[i];
			if(find(name)==-1) printf("-1\n"),exit(0);
//			cout<<"give value:\tname="<<name<<"\ttmp="<<tmp<<"\tcmd="<<cmd<<endl;
			if(getvalue(tmp)==-1||getvalue(tmp)>=arr[find(name)].size) printf("-1\n"),exit(0);
			p++;
			cmd.erase(0,p+2);
//			cout<<"give value:\tname="<<name<<"\ttmp="<<tmp<<"\tcmd="<<cmd<<endl;
			arr[find(name)].a[getvalue(tmp)]=getvalue(cmd);
		}
//		outlist();
	}
}