sentence1: If Bill needs to walk from the corner of 2 nd Rd and 3 rd Ave to the corner of 6 th Rd and 9 th Ave in the shortest possible time , how many different routes could he take ?
sentence2: If Bill needs to walk from the corner of more than 2 nd Rd and 3 rd Ave to the corner of 6 th Rd and 9 th Ave in the shortest possible time , how many different routes could he take ?