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 dp_builder(s):
    a = [0] * (len(s) + 1)
    c = s[0]
    count = 0
    i = 1
    while i < len(s):
        if (s[i] == c):
            count += 1
        a[i+1] = count
        c = s[i]
        i += 1
    return a

if __name__ == '__main__':
    s = input()
    m = int(input())
    res = []
    a = dp_builder(s)
    for i in range(m):
        l, r = [int(x) for x in input().split()]
        res.append(a[r]-a[l])
    print(*res,sep='\n')