#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<cmath>
#include<queue>
#include<stack>
#include<algorithm>
#include<vector>
#define int long long
using namespace std;
const int N=1e6+5;
const int INF=0x3f3f3f3f;
int dep[N],fa[N],dis[N];//dep[i]此条队伍的人数    fa[i]这个人的祖宗/也是这个人所在的队伍   dis[i]这个人在他所在的队列里的位置（第几名）
void init(){
	for(int i=1;i<=30000;i++){
		fa[i]=i;
		dep[i]=1,dis[i]=0;
	}
}
int find(int x){
	if(fa[x]==x)return x;
	int xx=find(fa[x]);
	dis[x]+=dis[fa[x]];
	return fa[x]=xx;
}
void add(int x,int y){
	int fx=find(x);
	int fy=find(y);
	dis[fx]+=dep[fy];
	fa[fx]=fy;
	dep[fy]+=dep[fx];
	dep[fx]=0;
	
}
int sum(int x,int y){
	int fx=find(x);
	int fy=find(y);
	if(fx!=fy){
		return -1;
	}
	return abs(dis[x]-dis[y])-1;
}
signed main(){
	int n;
	scanf("%lld",&n);
	init();
	for(int i=1;i<=n;i++){
		char opt;
		int x,y;
		cin >> opt;
		scanf("%lld%lld",&x,&y);
		if(opt=='M'){
			add(x,y);
		}else if(opt=='C'){
			cout << sum(x,y) << endl;
		}
	}
	return 0;
}