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:
from sys import stdin, stdout


def main():
    s = input()
    check = [0] * (len(s) + 1)
    dp = [0] * (len(s) + 1)
    for i in range(1, len(s)):
        if s[i] == s[i - 1]:
            check[i + 1] = 1
    for i in range(2, len(s) + 1):
        dp[i] += dp[i - 1] + check[i]
    m = int(stdin.readline())
    for _ in range(m):
        x, y = map(int, stdin.readline().split())
        if x == y:
            stdout.write('0')
        else:
            stdout.write(str(dp[y] - dp[x]))
        stdout.write('\n')


if __name__ == "__main__":
    main()