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:
str = raw_input()
n = int(raw_input())
b = [0] * len(str)
for i in xrange(0,len(str)-1):
    if str[i] == str[i+1]:
        b[i] = 1

csum = [0] * len(str)
csum[0] = b[0]

for i in xrange(1,len(str)):
    csum[i] = csum[i-1] + b[i]

# print csum,b    
for x in xrange(0,n):
    a,y = map(int,raw_input().split())
    # print a,y
    print csum[y-1] - csum[a-1] + b[a-1] - b[y-1]