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 PYTHON):

Solution:
def precalc(in_str):
    precalc_str = [0]
    for i in range(1, len(in_str)):
        cur_val = precalc_str[i-1]
        if in_str[i] == in_str[i-1]:
            cur_val += 1
        precalc_str.append(cur_val)
    return precalc_str


def calc_change(precalc_str, l, r):
    l_val = precalc_str[l-1]
    r_val = precalc_str[r-1]

    return r_val - l_val

in_str = raw_input()
prc = precalc(in_str)
input_len = int(raw_input())

for _ in range(input_len):
    l, r = raw_input().split(' ')
    print(calc_change(prc, int(l), int(r)))