All SilverTests Beginner Coder (STBCoder) contests are tagged as
STBC001,
STBC002,
... from Round 1 to Round 999. After the
STBC999 round, a problem arises: how should the next rounds be marked? In the end, it was decided for rounds from 1000 to 1999 to be marked as
STBD000,
STBD001,
...,
STBD999. Rounds 2000 to 2999 are marked as
STBE000, STBE001, ..., STBE999 etc., each time the last letter is changed (
STBC, STBD, STBE, ..., STBL). Rounds from 1 to 9999 are thus marked.
You are given an integer
N between 1 and 9999 (inclusive). Print the first four characters of the label for the
Nth round of the SilverTests Begginer Coder.
Input
Input
N integer (
\(1<=N<=9999\)).
Imprint
Print the first three characters of the label for the
Nth round of the SilverTests Beginner Coder Contest.
Examples
| # |
Input |
Output |
| 1 |
999 |
STBC |
| 2 |
1000 |
STBD |
| 3 |
6345 |
STBI |