/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
import java.time.* ;
import java.time.format.* ;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
        String input = "99-18" ;  // Valid: "01-18"  Invalid: "99-18"
        DateTimeFormatter f = DateTimeFormatter.ofPattern( "MM-uu" ) ;
 
        YearMonth ym = null ;
        try {
            ym = YearMonth.parse( input , f ) ;
        } catch ( DateTimeParseException e ) {
        	System.out.println( "Invalid input: " + input ) ;
        }
 
        System.out.println( "ym.toString(): " + ym ) ;
	}
}

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