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 ilya_and_queries(a, f,n):

        d = [0] * len(s)

        for i in range(1, len(s)):
            d[i] = d[i - 1]
            if a[i] == a[i - 1]:
                d[i] += 1

        ans = []
        for i in range(n):
            l, r = f[i]
            ans.append(d[r - 1] - d[l - 1])

        for i in range(n):
            print(ans[i])

# --------------------------------------------------------------
if __name__ == '__main__':
    s = input()
    m = int(input())
    v = []
    for i in range(m):
        x,y = list(map(int, input().split()))
        v.append([x,y])
    ilya_and_queries(s, v,m)