PROGRAMMING:Addition within 100
Xiao Ming is just in the first grade of primary school. His math teacher has just taught him how to add integers up to 100. In his mid-term test, the math teacher came up with a problem, which is to find the sum of all integers between two integers, including the boundary integer value. Is Xiao Ming very difficult? Now I want you to program to help Xiao Ming solve the problem.
###Input format:
Enter two boundary integer values m, n (1 < = m < = n < = 100) in a row, separated by spaces.
###Output format:
Output the sum of all integers from m to N on one line.
###Input example:
```in
2 7
```
###Output example:
```out
twenty-seven
```
answer：If there is no answer, please comment
###Input format:
Enter two boundary integer values m, n (1 < = m < = n < = 100) in a row, separated by spaces.
###Output format:
Output the sum of all integers from m to N on one line.
###Input example:
```in
2 7
```
###Output example:
```out
twenty-seven
```
answer：If there is no answer, please comment