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 str2dic(s):
    dic = dict()
    i = 0
    while i + 1 < len(s):
        if s[i] == s[i + 1]:
            dic[i] = 1
        else:
            dic[i] = 0
        i += 1
    return dic

def get_sum(d0):
    d1 = dict()
    d1[0] = d0[0]
    for i in range(1, len(d0) ):
        d1[i] = d1[i - 1] + d0[i]
    return d1

def str2pair(s):
    l = s.split()
    t = tuple()
    for i in l:
        t = t + (int(i), )
    return t

def get_input():
    global oris
    global n
    global pair

    oris = input()
    tmp = input()
    n = int(tmp)

    i = 0
    while i < n:
        tmp = input()
        pair.append(str2pair(tmp))
        i += 1
#    print (pair)
    return None

if __name__ == '__main__':
    oris = ""
    n = 0
    pair = []
    get_input()

    dic = str2dic(oris)
    sum = get_sum(dic)

    for l, r in pair:
        if (l == 1):
            ans = sum[r - 2]
        else:
            ans = sum[r - 2] - sum[l - 2]
        print(ans)