Background

Original problem link: https://oier.team/problems/X3B。

But as everyone knows, RiOI split off from KDOI, so this is just for fun... (whisper)
Sorry, KDOI, meow!

Problem Description

Define a string as good flash if and only if it contains the substring RiOI (case-insensitive, for example, containing rioi, RIOI, rIoI all counts as containing it).

Given two non-empty strings $s, t$ that contain only uppercase and lowercase English letters:

• If both strings are good flash, output Either is ok!。
• Otherwise, if $s$ is good flash, output $s$ for sure!。
• Otherwise, if $t$ is good flash, output $t$ for sure!。
• If neither string is good flash, output Try again!。

Input Format

Two lines, each contains a non-empty string consisting only of uppercase and lowercase English letters, representing $s, t$.

Output Format

One line with one string, representing your answer.

RiOI
KDOI

RiOI for sure!

RiOIroundfour
RiOIroundnegtiveone

Either is ok!

majsoul
digdigio

Try again!

GoInForNOI
GoInForIOI

GoInForIOI for sure!

Hint

Sample Explanation #1

RiOI contains the substring RiOI, while KDOI does not, so output RiOI for sure!。

Sample Explanation #2

RiOIroundfour and RiOIroundnegtiveone both contain the substring RiOI, so output Either is ok!。

Sample Explanation #4

GoInForIOI contains the substring rIOI, while GoInForNOI does not, so output GoInForIOI for sure!。

Constraints

For $50\%$ of the testdata, $s, t$ are guaranteed to contain only lowercase English letters.
For $100\%$ of the testdata, the lengths of $s, t$ are both at most $1\ 000$, and both are non-empty strings consisting only of uppercase and lowercase English letters.

Translated by ChatGPT 5