What is the time complexity of this program in terms of the Big O$?$ import java.util.Scanner;

public class SabaCounting $\{$

public static void main$($String$[]$ args$)\{$

try $($Scanner sc $=$ new Scanner$($System$.$in$))\{$

System.out.print$("$Enter n value:"$)$;

int n $=$ sc$.$nextInt$()$;

System.out.print$("$Enter m value:"$)$;

int m $=$ sc$.$nextInt$()$;

System.out.println$("$Enter $5$ lines of $5$ characters:"$)$;

sc$.$nextLine$()$;

int count$=0$;

char grid$[][]=$ new char$[$n$][$m$]$;

for$($int i$=0$; i