def main():
    case_no = 0
    while True:
        try:
            string = input()
        except:
            exit()

        if string == "\n":
            break

        case_no = case_no + 1
        if case_no == 1:
            print("Case %d:" % case_no)
        else:
            print("\nCase %d:" % case_no)

        n = int(input())

        for it in range(n):
            i, j = input().split()
            i, j = int(i), int(j)

            a = i if i <= j else j
            b = j if j > i else i

            flag = True
            retorno = ''
            for x in range(a+1, b+1):
                if string[x] != string[x-1]:
                    retorno = 'No'
                    flag = False
                    break

            if flag:
                retorno = 'Yes'

            print(retorno, end="" if it == n - 1 else "\n")

if __name__ == "__main__":
    main()