PROGRAMMING:Annual feedback
The club class of the first semester is coming to an end, and the last club competition is coming. In the last competition, as a senior student, I hope you all get good grades, so I secretly come to the annual feedback
But to get this annual feedback, you have to find out the number of 0 and 1 in the string of 01 I gave you. If the number of 0 and 1 is even, you will output yes, otherwise you will output No.
You see is not very simple ah, in order to be more simple, the length of the string will not exceed 1000, refueling do other topics. There are plenty of rewards.
###Input format:
Multiple groups of input are required, and a 01 string with length no more than 1000 is input
###Output format:
If the number of zeros and the number of ones are even, you output yes, otherwise you output No.
###Input example:
Here is a set of inputs. For example:
```in
ten
```
###Output example:
The corresponding output is given here. For example:
```out
no
```
answer：If there is no answer, please comment
But to get this annual feedback, you have to find out the number of 0 and 1 in the string of 01 I gave you. If the number of 0 and 1 is even, you will output yes, otherwise you will output No.
You see is not very simple ah, in order to be more simple, the length of the string will not exceed 1000, refueling do other topics. There are plenty of rewards.
###Input format:
Multiple groups of input are required, and a 01 string with length no more than 1000 is input
###Output format:
If the number of zeros and the number of ones are even, you output yes, otherwise you output No.
###Input example:
Here is a set of inputs. For example:
```in
ten
```
###Output example:
The corresponding output is given here. For example:
```out
no
```
answer：If there is no answer, please comment