n = int(input())
m = int(input())
matrix =[]
for i in range(n):
matrix.append([])
for e in range(m):
matrix[i].append("")
so I make my arrangement
Now I want to add letters in each position as I can.
Example:
entry
asd
dsa
qwe
exit
[['a', 's', 'd'], ['d', 's', 'a'], ['q', 'w', 'e']]