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:
import bisect

s = raw_input()
# Naive, O(mn)
# m = input()
# for i in xrange(m):
#     l,r = map(int, raw_input().split())
#     flips = sum([s[j-1] != s[j] for j in xrange(l,r)])
#     print r-l-flips

# binary search, O(mlogn)
a = [] # index of flips
for i in xrange(1, len(s)):
    if s[i-1] != s[i]:
        a.append(i)

m = input()
for i in xrange(m):
    l,r = map(int, raw_input().split())
    li = bisect.bisect_left(a, l)
    ri = bisect.bisect_left(a, r)
    print r-l-(ri-li)