using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace AtCoder.ABC122.B
{
    class Program
    {
        static void Main()
        {
            var sc = new Scanner();
            var N = sc.Nextint();
            var Q = sc.Nextint();
            var S = sc.Next();
            var l = new int[Q];
            var r = new int[Q];
            for (int i = 0; i < Q; i++)
            {
                l[i] = sc.Nextint() - 1;
                r[i] = sc.Nextint() - 1;
            }

            var comCount = new int[N];
            for (int i = 0; i < N; i++)
            {
                if (i == 0)
                {
                    continue;
                }
                else if (S[i] == 'C' && S[i - 1] == 'A')
                {
                    comCount[i] = comCount[i - 1] + 1;
                }
                else
                {
                    comCount[i] = comCount[i - 1];
                }
            }
            Console.Error.WriteLine(string.Join(", ", comCount));

            for (int i = 0; i < Q; i++)
            {
                var count = comCount[r[i]] - comCount[l[i]];

                Console.WriteLine(count);
            }
        }
    }

    class Scanner
    {
        string[] s;
        long i;

        char[] cs = new char[] { ' ' };

        public Scanner()
        {
            s = new string[0];
            i = 0;
        }

        public string Next()
        {
            if (i < s.Length) return s[i++];
            string st = Console.ReadLine();
            while (st == "") st = Console.ReadLine();
            s = st.Split(cs, StringSplitOptions.RemoveEmptyEntries);
            if (s.Length == 0) return Next();
            i = 0;
            return s[i++];
        }

        public int Nextint()
        {
            return int.Parse(Next());
        }
        public int[] Arrayint(int N, int add = 0)
        {
            int[] Array = new int[N];
            for (int i = 0; i < N; i++)
            {
                Array[i] = Nextint() + add;
            }
            return Array;
        }

        public long NextLong()
        {
            return long.Parse(Next());
        }

        public long[] ArrayLong(int N, long add = 0)
        {
            long[] Array = new long[N];
            for (long i = 0; i < N; i++)
            {
                Array[i] = NextLong() + add;
            }
            return Array;
        }

        public double NextDouble()
        {
            return double.Parse(Next());
        }

        public double[] ArrayDouble(long N, double add = 0)
        {
            double[] Array = new double[N];
            for (long i = 0; i < N; i++)
            {
                Array[i] = NextDouble() + add;
            }
            return Array;
        }

        public decimal NextDecimal()
        {
            return decimal.Parse(Next());
        }

        public decimal[] ArrayDecimal(long N, decimal add = 0)
        {
            decimal[] Array = new decimal[N];
            for (long i = 0; i < N; i++)
            {
                Array[i] = NextDecimal();
            }
            return Array;
        }
    }
}


Measured memory_bytes: 21572