include "globals.mzn";
int: TOTAL = 49;
array[1..3,1..3] of var 1..TOTAL-3: x;
constraint x[2,2] = 21;
constraint alldifferent([x[i,j] | i in 1..3, j in 1..3]);
constraint forall(i in 1..3)(sum(j in 1..3)(x[i,j]) = TOTAL);
constraint forall(j in 1..3)(sum(i in 1..3)(x[i,j]) = TOTAL);
constraint sum(i in 1..3)(x[i,i]) = TOTAL;
constraint sum(i in 1..3)(x[4-i,i]) = TOTAL;

solve satisfy;

output [show([x[1,i] | i in 1..3]), "\n",
show([x[2,i] | i in 1..3]), "\n",
show([x[3,i] | i in 1..3]), "\n" ];