URI Online Judge | 1362
# My T-Shirt Suits Me

**Timelimit: 1**

By Ginés García Mateos, UM España

Our friend Victor participates as an instructor in an environmental volunteer program. His boss asked him to distribute N T-shirts to M volunteers, one T-shirt each volunteer, where N is multiple of six, and N ≥ M. There are the same number of T-shirts of each one of the six available sizes: XXL, XL, L, M , S, and XS. Victor has a little problem because only two sizes of the T-shirts suit each volunteer.

You must write a program to decide if Victor can distribute T-shirts in such a way that all volunteers get a T-shirt that suit them. If N ≠ M, there can be some remaining T-shirts.

The first line of the input contains the number of test cases.

For each test case, there is a line with two numbers **N** and **M**. **N** is multiple of 6, 1 ≤ **N** ≤ 36, and indicates the number of T-shirts. Number **M**, 1 ≤ **M** ≤ 30, indicates the number of volunteers, with **N** ≥ **M**. Subsequently, **M** lines are listed where each line contains, separated by one space, the two sizes that suit each volunteer (*XXL*, *XL*, *L*, *M* , *S*, or *XS*).

For each test case you are to print a line containing *YES* if there is, at least, one distribution where T-shirts suit all volunteers, or *NO*, in other case.

Sample Input | Sample Output |

3 |
YES |