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 run():
    write = stdout.write
    cadena = stdin.readline()
    values = [0] * len(cadena)
    point = num = 0
    for i in range(1, len(cadena)):
        if cadena[i] == cadena[i - 1]:
            values[i] = values[i - 1] + 1
        else:
            values[i] = values[i - 1]
    n = int(stdin.readline())
    ans = []
    for i in range(n):
        l, r = map(int, stdin.readline().split())
        ans.append(str(abs(values[l - 1] - values[r - 1])))
    write('\n'.join(ans))

if __name__ == "__main__":
   run()