PROGRAMMING:Output lower triangle character array in reverse order
This problem requires the preparation of the program, * * reverse * * output n lines from the specified upper case English characters to form the lower left triangle character array. If the character is lower than a during the display, please return to Z to continue the display
###Input format:
Enter a positive integer n (1 ≤ n < 7) and an uppercase English character startchar in one line.
###Output format:
Reverse output n lines of upper case letter startchar start to form the lower left triangle character array. The format is shown in the output sample, where there is a space after each letter.
###Input example:
```in
4 X
```
###Output example:
```out
X
W V
U T S
R Q P O
```
answer：If there is no answer, please comment
###Input format:
Enter a positive integer n (1 ≤ n < 7) and an uppercase English character startchar in one line.
###Output format:
Reverse output n lines of upper case letter startchar start to form the lower left triangle character array. The format is shown in the output sample, where there is a space after each letter.
###Input example:
```in
4 X
```
###Output example:
```out
X
W V
U T S
R Q P O
```
answer：If there is no answer, please comment