t | st = input().split(',') | t | st = input().split(',') |
| matr = [[j for j in input().split(',')] for i in range(len(st) - 1)] | | matr = [[j for j in input().split(',')] for i in range(len(st) - 1)] |
| matr.insert(0, st) | | matr.insert(0, st) |
| print(matr[0][0]) | | print(matr[0][0]) |
| for i in range(1, len(st)): | | for i in range(1, len(st)): |
| print(','.join(matr[i][:i + 1]), end='') | | print(','.join(matr[i][:i + 1]), end='') |
| j = i | | j = i |
| while i != 0: | | while i != 0: |
| print(',', end='') | | print(',', end='') |
| print(matr[i - 1][j], end='') | | print(matr[i - 1][j], end='') |
| i -= 1 | | i -= 1 |
| print(sep='\n') | | print(sep='\n') |