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 PYTHON):

Solution:
# python2
import sys
import os.path

def main():
    if os.path.exists('input.txt'):
        input = open('input.txt', 'r').read()
    else:
        input = sys.stdin.read()
    #--------------------------------INPUT---------------------------------
    data = list(map(str, input.split()))
    s = data[0]
    lol = lambda lst, sz: [lst[i:i+sz] for i in range(2, len(lst), sz)]
    mylist = lol(data, 2)
    dp = [0]*len(s)
    for i in range(len(s)):
        if i==0:
            dp[i]=0
            continue
        if s[i]==s[i-1]:
            dp[i]=dp[i-1]+1
        else:
            dp[i]=dp[i-1]
    sol = []
    for x,y in mylist:
        sol.append(dp[int(y)-1]-dp[int(x)-1])
    output =  '\n'.join(map(str, sol))
    #-------------------------------OUTPUT----------------------------------
    if os.path.exists('output.txt'):
        open('output.txt', 'w').writelines(str(output))
    else:
        sys.stdout.write(str(output))


if __name__ == "__main__":
    main()