#include <iostream>
#include <math.h>
using namespace std;


int find(int *f,int *v,int x){
	if(f[x] == x) return x;
	int s=f[x],dif=v[s]-v[x];
	f[x] = find(f,v,f[x]);
	v[x] += v[s];
	return f[x];
}


int main(){
	int t;
	int f[30005],v[30005]={0},mx[30005];
	cin>>t;
	for(int i=0;i<30005;i++){
		f[i] = i;
		mx[i] = 1;
	}
	for(int i=0;i<t;i++){
		char comm;  //ָ 
		int x,y;  //i,j
		cin>>comm>>x>>y;
		x--;
		y--;
		int fx=find(f,v,x),fy=find(f,v,y);
		if(comm == 'M'){
			f[fx] = fy;
			v[fx] = mx[fy];
			mx[fy] += mx[fx];
			mx[fx] = 0;
		}
		else{
			if(fx == fy)
				cout<<(abs(v[x]-v[y])-1)<<endl;
//				int out=abs(v[x]-v[y])-1;
			else
				cout<<-1<<endl;
//				int out=-1;
		}
	}
	return 0;
}