Answer Happy

Enter the numbers that correspond to elementary matrices from this list. For example, if just the first two are elementary, you would enter 1,2. You must enter them in increasing order.

3 2 0 1 1 (11) (1) ) 4 0 -4 5 1 0 1 1 0 6 0 1 1 50 7 0 1 04 8 10 0 0 0 9 0 1 0 001)