Problem: Ilya the Lion wants to help all his friends with passing exams. They need to solve the following problem to pass the IT exam.

You've got string s = s1s2... sn (n is the length of the string), consisting only of characters "." and "#" and m queries. Each query is described by a pair of integers li, ri (1 ≤ li < ri ≤ n). The answer to the query li, ri is the number of such integers i (li ≤ i < ri), that si = si + 1.

Ilya the Lion wants to help his friends but is there anyone to help him? Help Ilya, solve the problem.

Input

The first line contains string s of length n (2 ≤ n ≤ 105). It is guaranteed that the given string only consists of characters "." and "#".

The next line contains integer m (1 ≤ m ≤ 105) — the number of queries. Each of the next m lines contains the description of the corresponding query. The i-th line contains integers li, ri (1 ≤ li < ri ≤ n).

Output

Print m integers — the answers to the queries in the order in which they are given in the input.

Examples

Input

......
4
3 4
2 3
1 6
2 6


Output

1
1
5
4


Input

#..###
5
1 3
5 6
1 5
3 6
3 4


Output

1
1
2
2
0

Solution (in JAVA):

Solution:

import java.util.*;
import java.io.*;

public class dpcodeforces {

    static class Reader {

        final private int BUFFER_SIZE = 1 << 16;
        private DataInputStream din;
        private byte[] buffer;
        private int bufferPointer, bytesRead;
        BufferedReader br; 
        StringTokenizer st;

        public Reader() {
            din = new DataInputStream(System.in);
            buffer = new byte[BUFFER_SIZE];
            bufferPointer = bytesRead = 0;
            br = new BufferedReader(new
                     InputStreamReader(System.in)); 
        }

        public Reader(String file_name) throws IOException {
            din = new DataInputStream(new FileInputStream(file_name));
            buffer = new byte[BUFFER_SIZE];
            bufferPointer = bytesRead = 0;
        }

        public String readLine() throws IOException {
            byte[] buf = new byte[1000000]; // line length 
            int cnt = 0, c;
            while ((c = read()) != -1) {
                if (c == '\n') {
                    break;
                }
                buf[cnt++] = (byte) c;
            }
            return new String(buf, 0, cnt);
        }

        public int nextInt() throws IOException {
            int ret = 0;
            byte c = read();
            while (c <= ' ') {
                c = read();
            }
            boolean neg = (c == '-');
            if (neg) {
                c = read();
            }
            do {
                ret = ret * 10 + c - '0';
            } while ((c = read()) >= '0' && c <= '9');

            if (neg) {
                return -ret;
            }
            return ret;
        }

        public long nextLong() throws IOException {
            long ret = 0;
            byte c = read();
            while (c <= ' ') {
                c = read();
            }
            boolean neg = (c == '-');
            if (neg) {
                c = read();
            }
            do {
                ret = ret * 10 + c - '0';
            } while ((c = read()) >= '0' && c <= '9');
            if (neg) {
                return -ret;
            }
            return ret;
        }

        public double nextDouble() throws IOException {
            double ret = 0, div = 1;
            byte c = read();
            while (c <= ' ') {
                c = read();
            }
            boolean neg = (c == '-');
            if (neg) {
                c = read();
            }

            do {
                ret = ret * 10 + c - '0';
            } while ((c = read()) >= '0' && c <= '9');

            if (c == '.') {
                while ((c = read()) >= '0' && c <= '9') {
                    ret += (c - '0') / (div *= 10);
                }
            }

            if (neg) {
                return -ret;
            }
            return ret;
        }

        private void fillBuffer() throws IOException {
            bytesRead = din.read(buffer, bufferPointer = 0, BUFFER_SIZE);
            if (bytesRead == -1) {
                buffer[0] = -1;
            }
        }

        private byte read() throws IOException {
            if (bufferPointer == bytesRead) {
                fillBuffer();
            }
            return buffer[bufferPointer++];
        }
        String next() 
        { 
            while (st == null || !st.hasMoreElements()) 
            { 
                try
                { 
                    st = new StringTokenizer(br.readLine()); 
                } 
                catch (IOException  e) 
                { 
                    e.printStackTrace(); 
                } 
            } 
            return st.nextToken(); 
        } 

        public void close() throws IOException {
            if (din == null) {
                return;
            }
            din.close();
        }
    }

    static class Comb {

        static long nCr(int n, int k) {
            long C[] = new long[k + 1];

            // nC0 is 1 
            C[0] = 1;

            for (int i = 1; i <= n; i++) {
                for (int j = Math.min(i, k); j > 0; j--) {
                    C[j] = C[j] + C[j - 1];
                }
            }
            return C[k];
        }
    }

    static int bs(int arr[], int x) {
        int l = 0, r = arr.length - 1;
        int m = 0;
        while (l <= r) {
            m = l + (r - l) / 2;

            if (arr[m] < x) {
                l = m + 1;
            } else {
                r = m - 1;
            }
        }
        if (arr[m] >= x) {
            return m;
        }
        return m + 1;

    }
    static int sum(int n){
        int ans=0;
        while(n>0){
            ans+=n%10;
            n=n/10;
        }
        return ans;
    }
    public static void main(String[] args) throws IOException {
        int mod = 1000000007;
        //Reader br = new Reader();
        //Scanner sc=new Scanner(System.in);
       BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String s = br.readLine();
        int n=s.length();
        int ans[]=new int[n+10];
        for (int i = 1; i < n; i++) {
            ans[i]=ans[i-1];
            if(s.charAt(i)==s.charAt(i-1))
            {    ans[i]++;
            }
        }
        int m = Integer.parseInt(br.readLine());
        for (int i = 0; i < m; i++) {
            String[] input = br.readLine().split(" ");
            int x = Integer.parseInt(input[0])-1;
            int y = Integer.parseInt(input[1])-1;
            
                System.out.println(ans[y]-ans[x]);
            }
            
        }
        
    }



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