GRAND ASSIGNMENT - 2 Alphabetic Symbol

 Alphabetic Symbol

Write a program to print the right alphabetic triangle up to the given N rows.

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Input

The input will be a single line containing a positive integer (N).

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Output

The output should be N rows with letters.
Note: There is a space after each letter.

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Explanation

For example, if the given number of rows is 4,
your code should print the following pattern.

A 
A B 
A B C 
A B C D

Sample Input 1

4

Sample Output 1

A 
A B 
A B C 
A B C D 

Sample Input 2

6

Sample Output 2

A 
A B 
A B C 
A B C D 
A B C D E 
A B C D E F 

code;

r=int(input())
alphabet=65

for i in range (0,r):
    for j in range (0,i+1):
        print("%c"%(alphabet+j),end =" ")
    print()