PROGRAMMING:The maximum of four numbers

Using relational operation and conditional operation, program input 4 integers and output their maximum value.
#####Input example:
```in
1 2 3 4
```
#####Output example:
```out
four
```
#####Input example:
```in
3 1 4 2
```
#####Output example:
```out
four
```






answer：If there is no answer, please comment