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:
s = input().strip()
num_queries = int(input())
slen = len(s)

# Compute array of values, where 1 if a_i == a_i+1
is_consecutives = [0 for i in range(slen)]
# is_consecutives = []
for i in range(slen):
    is_consecutives[i] = 1 if i < slen-1 and s[i] == s[i + 1] else 0
    # is_consecutives.append(1 if i < slen - 1 and s[i] == s[i + 1] else 0)

# Compute array of sums
sums = [0 for i in range(slen)]
# sums = []
curr_sum = 0
for i in range(slen):
    curr_sum += is_consecutives[i]
    sums[i] = curr_sum
    # sums.append(curr_sum)

# def create_lookup_table(s):
#     length = len(s) - 1
#     res = [1] if s[0] == s[1] else [0]
#     for i in range(1, length):
#         if s[i] == s[i + 1]:
#             res.append(res[-1] + 1)
#         else:
#             res.append(res[-1])
#     return res

# sums = create_lookup_table(s)

# print('is consecutives: {}'.format(is_consecutives))
# print('sums: {}'.format(sums))

res = []
for _ in range(num_queries):
    l1, r1 = map(int, input().split())
    l, r = l1 - 1, r1 - 1

    query = sums[r - 1] - (sums[l - 1] if l > 0 else 0)

    # print(l, r, sums, sums[l - 1], sums[r - 1], query)
    # print(query)
    res.append(query)

for r in res:
    print(r)