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 PYTHON3):

Solution:

import sys

def write_to_stdout(res):
    sys.stdout.write('%s\n' % res)

def get_value_array(s):
    ans = [0]
    count = 0
    for i in range(1, len(s)):
        if s[i] == s[i-1]:
            count += 1
        ans.append(count)
    return ans
     
def main():
    s = input()
    N = int(input())
    value_array = get_value_array(s)
    res = []
    while N > 0:
        N -= 1
        l, r = [int(_) for _ in input().split()] 
        res.append(str(value_array[r-1] - value_array[l-1]))
    write_to_stdout('\n'.join(res))
  
if __name__ == '__main__':
    main()