Weekday Code

Source: Phước Hưng OJ

Version: Phuoc Hung OJ Extended

Problem Statement

A system encodes Monday through Sunday by integers 1 through 7, respectively. Convert the given integer d to its three-letter uppercase English abbreviation. If d lies outside 1 through 7, it is invalid.

Input

One line contains integer $d$, the weekday code.

Output

Print exactly MON, TUE, WED, THU, FRI, SAT, or SUN for codes 1 through 7 respectively; print INVALID otherwise.

Subtasks

• Subtask 1 (20 points): 1 <= d <= 7.

• Subtask 2 (30 points): -10 <= d <= 10.

• Subtask 3 (50 points): -1000 <= d <= 1000.

Examples

Example 1

Input

1

Output

MON

Explanation

Code 1 denotes Monday and maps to MON.

Example 2

Input

8

Output

INVALID

Explanation

Code 8 is not assigned to a weekday, so the default applies.