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:
def main():
    from sys import stdin, stdout
    write = stdout.write

    tokens = iter(stdin.read().split())
    S = next(tokens)
    tokens = map(int, tokens)
    M = next(tokens)

    memo = [0] * len(S)
    for i in range(1, len(S)):
        if S[i] == S[i-1]:
            memo[i] = memo[i-1] + 1
        else:
            memo[i] = memo[i-1]

    ans = [ str(memo[r-1] - memo[l-1]) for l,r in zip(tokens, tokens) ]
    write('\n'.join(ans))

main()