#include "bits/stdc++.h"
using namespace std;
#define ll long long
#define endl '\n'
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define rep2(i,a,b) for(int i=int(a);i<int(b);i++)
#define pb emplace_back
#define all(x) (x).begin(),(x).end()
ll mod=1e9+7;
ll mod2=998244353;
const int INF=1e9;


signed main() {
	ll n,q;
	cin>>n>>q;
	string s;
	cin>>s;
	rep(i,n-1){
		if(s[i]=='A'&&s[i+1]=='C')s[i]='a';
	}
	vector<ll> rui(n+2,0);
	rep(i,n){
		rui[i+1]+=rui[i];
		if(s[i]=='a')rui[i+1]++;
	}

	rep(k,q){
		ll l,r;
		cin>>l>>r;
		cout<<rui[r-1]-rui[l-1]<<endl;
	}
}


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