#!/bin/python3

import sys

def initialize(s):
    string = [i for i in s]
    return string
def answerQuery(l, r):
    a = ((r - l) + 1)//2
    return a

if __name__ == "__main__":
    s = input().strip()
    initialize(s)
    q = int(input().strip())
    for a0 in range(q):
        l, r = input().strip().split(' ')
        l, r = [int(l), int(r)]
        result = answerQuery(l, r)
        print(result)