PROGRAMMING:Is the teacher online
Ah Fu decided to answer questions online. It starts at 20:00 p.m. and ends at 21:15 p.m（ The teacher was still there at 21:15, and left at 21:16).
Xiao Tang has a question, but he doesn't remember the answer time at all. Please write a program: Tell Xiao Tang if the teacher is online.
###Input format:
Contains two integers, separated by a space, respectively, the hour and minute of the question time.
###Output format:
Output yes, indicating that the teacher is online; Output no, indicating that the teacher is not online.
###Input example:
Example 1
```in
19 59
```
Example 2
```in
21 15
```
###Output example:
Example 1
```out
NO
```
Example 2
```out
YES
```
answer：If there is no answer, please comment
Xiao Tang has a question, but he doesn't remember the answer time at all. Please write a program: Tell Xiao Tang if the teacher is online.
###Input format:
Contains two integers, separated by a space, respectively, the hour and minute of the question time.
###Output format:
Output yes, indicating that the teacher is online; Output no, indicating that the teacher is not online.
###Input example:
Example 1
```in
19 59
```
Example 2
```in
21 15
```
###Output example:
Example 1
```out
NO
```
Example 2
```out
YES
```
answer：If there is no answer, please comment