1MS : 2.5.21 t

[1, 1, 1,  9]
[1, 2, 3, 14]
[3, 2, 1, 22]

L_2 <- L_2 - 1 * L_1

[1, 1, 1,  9]
[0, 1, 2,  5]
[3, 2, 1, 22]

L_3 <- L_3 - 3 * L_1

[1,  1,  1,  9]
[0,  1,  2,  5]
[0, -1, -2, -5]

L_3 <- L_3 + 1 * L_2

[1, 1, 1, 9]
[0, 1, 2, 5]
[0, 0, 0, 0]