import java.util.ArrayList;
import java.util.Scanner;

public class hiii {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int ary[][] = new int[9][9];

while(scanner.hasNext()){
boolean yes = true;
int sum=0,sum2=0;

for(int i=0;i<9;i++){
for(int j=0;j<9;j++){
ary[i][j] = scanner.nextInt();
}
}

ntr:for(int i=0;i<9;i++){ //sum確認9*9,sum2確認3*3
for(int j=0;j<9;j++){
sum+=ary[i][j];
sum+=ary[j][i];

sum2+=ary[i/3*3+j/3][i%3*3+j%3];

if(j==8){
if(sum!=90 || sum2!=45){
System.out.println("no");
yes = false;
break ntr;
}
sum=0;
sum2=0;
}
}
}
if(yes==true){
System.out.println("yes");
}

}

}
}