humble
说明
一个数，完全分解后，它的因数只由2 3 5 7组成的数，就是humble数，比如1,2,3,4,5,6,7,8,9,10,12,14,15,16,18,20,21,24,25,27...显示了前20个humble数。
找出第n个humble数是什么。
输入格式
N(1<=N<=5842)输出格式
见样例1
11
2The 1st humble number is 1.
The 11th humble number is 12.
The 2nd humble number is 2.