#include <bits/stdc++.h>
using namespace std;

#define rep(i, n) for(long long i=0;i<(long long)(n);i++)
#define rep2(i, s, n) for(long long i=(s);i<(long long)(n);i++)
#define repi(i, n) for(int i=0;i<(int)(n);i++)
#define rep2i(i, s, n) for(int i=(s);i<(int)(n);i++)
#define all(v) v.begin(), v.end()

#define deg2rad(deg) (((deg)/360)*2*M_PI)
#define rad2deg(rad) (((rad)/2/M_PI)*360)

using ll = long long;
using ld = long double;
using vll = vector<ll>;
using vvll = vector<vll>;
using P = pair<ll, ll>;
using vi = vector<int>;
using vvi = vector<vi>;

const ll INF = (1LL<<60);
const int INFi = (1<<29);

/*素数判定*/
bool is_prime(ll n){
    if(n==1) return false;
    for(ll i=2;i*i<=n;i++){
        if(n%i==0) return false;
    }
    return true;
}

/*約数列挙*/
vll enum_divisors(ll n){
    vll l;
    for(ll i=1;i*i<=n;i++){
        if(n%i==0){
            l.push_back(i);
            if(n/i != i) l.push_back(n/i);
        }
    }
   sort(all(l));
   return l;
}

/*素因数分解*/
vector<P> prime_factorize(ll n){
    vector<P> l;
    for(ll i=2;i*i<=n;i++){
        if(n%i!=0) continue;
        ll e = 0;
        while(n%i==0){
            e++;
            n /= i;
        }
        l.push_back({i, e});
    }
    if(n!=1) l.push_back({n, 1});
    return l;
}

/*最小公倍数*/
ll lcm(ll a, ll b){
    return a*b/__gcd(a,b);
}

/*最大公約数*/
ll gcd(ll a, ll b){
    return __gcd(a,b);
}

/*組み合わせ(Combination)*/
const ll CMAX = 1010000;
const ll CMOD = 1e9+7;
ll fac[CMAX], finv[CMAX], inv[CMAX];
// テーブルを作る前処理
void combinit() {
	fac[0] = fac[1] = 1;
	finv[0] = finv[1] = 1;
	inv[1] = 1;
	for (ll i = 2; i < CMAX; i++) {
		fac[i] = fac[i - 1] * i % CMOD;
		inv[i] = CMOD - inv[CMOD%i] * (CMOD / i) % CMOD;
		finv[i] = finv[i - 1] * inv[i] % CMOD;
	}
}
// 二項係数計算
ll comb(ll n, ll k) {
	if (n < k) return 0;
	if (n < 0 || k < 0) return 0;
	return fac[n] * (finv[k] * finv[n - k] % CMOD) % CMOD;
}


int main(){

    ll n, q; cin >> n >> q;
    string s; cin >> s;
    vll l(q), r(q); rep(i, q) cin >> l[i] >> r[i];

    vll a(n, 0);
    a[0] = 0;

    bool b = false;
    if(s[0]=='A') b = true;

    rep2(i, 1, n){
        a[i] = a[i-1];
        if(b && s[i]=='C'){
            a[i]++;
        }

        if(s[i]=='A'){
            b = true;
        }
        else{
            b = false;
        }
    }

    rep(i, q){
        cout << a[r[i]-1]-a[l[i]-1] << endl;
    }

    return 0;
}
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (long long i = 0; i < (long long)(n); i++)
typedef long long ll;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
const long long INF = 1LL << 60;
const int inf = 1001001001;
 
int main(){

    ll n, q;
    string s;
    cin >> n >> q >> s;
    vector<ll> dp(n, 0);
    for(ll i = 0; i < n-1; i++){
        if(s[i] == 'A' && s[i+1] == 'C'){
            dp[i+1] = (dp[i] + 1);
        }
        else{
            dp[i+1] = dp[i];
        }
    }

    while(q){
        ll l,r;
        cin >> l >> r;
        cout << dp[r-1] - dp[l-1] << endl;
        q--;
    }
    
 
}