PROGRAMMING:Output lower triangle character array
This problem requires the preparation of procedures, output n lines of upper case English characters from the specified composition of the lower left triangle character array. If the character exceeds Z during the display, please return to a 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:
Output n lines of lower left triangle character array starting from the capital letter startchar. The format is shown in the output sample, where there is a space after each letter.
###Input example:
```in
4 B
```
###Output example:
```out
B
C D
E F G
H I J K
```
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:
Output n lines of lower left triangle character array starting from the capital letter startchar. The format is shown in the output sample, where there is a space after each letter.
###Input example:
```in
4 B
```
###Output example:
```out
B
C D
E F G
H I J K
```
answer：If there is no answer, please comment