Character Triangle
Print a triangle where row i shows the first i letters.
Input format
One line with a single integer N (the size of the pattern).
Output format
Print N rows; row i prints the first i uppercase letters (A, B, C, ...) with no spaces.
Constraints
- Values fit in a 64-bit signed integer
- Trailing whitespace and a trailing newline are ignored by the judge
Read from stdin, write to stdout. Sample cases below show the exact format.
Sample cases
Example 1
Input
4Expected output
A
AB
ABC
ABCDExample 2
Input
5Expected output
A
AB
ABC
ABCD
ABCDE