PROGRAMMING:Loop - split into and

Input a natural number, split into the sum of two non negative integers, output all combinations
###Input format:
Enter a natural number
###Output format:
Split into the sum of two non negative integers, output all possible expressions of two numbers added
###Input example:
Here is a set of inputs. For example:
```in
seven
```
###Output example:
The corresponding output is given here. For example:
```out
0+7=7
1+6=7
2+5=7
3+4=7
```







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