585D

//I_love_StarnyC 
#include<bits/stdc++.h>
#define ll long long
#define ld long double
#define f first
#define s second
#define pb push_back
#define fix  cout<<std::fixed;
#define mk make_pair
#define mod 1000000007
#define time  cerr<< '\n' << "Time elapsed :" << clock() * 1000.0 / CLOCKS_PER_SEC << " ms\n" ;
#define IOS        ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
 
int main()
{  IOS
	ll n;cin>>n;ll sum=0;ll t;
	ll l=0,r=0;
	string s;cin>>s;
	for(int i=0;i<s.length()/2;i++)
	{
       if(s[i]!='?')sum+=(s[i]-'0');
       else l++;
	}
	for(int i=s.length()/2;i<s.length();i++)
	{
		if(s[i]!='?')sum-=(s[i]-'0');
		else r++;
	}
     t= abs(l-r);
	if(l<r)sum*=-1;
    ll u=9*t/2;
	if((sum+u)!=0)cout<<"Monocarp"<<endl;
	else cout<<"Bicarp"<<endl;
 
}