From given intege

It’s better to check every combination of numbers.

For -5:

(-5) × 1 = -5 (not between -19 and -6)

(-5) × (-1) = 5 (not between -19 and -6)

(-5) × 3 = -15 (-19 < -15 < -6)

(-5) × (-2) = 10 (not between -19 and -6)

For 6:

6 × 1 = 6 (not between -19 and -6)

6 × (-1) = -6 (not between -19 and -6)

6 × (-2) = -12 (-19 < -12 < -6)

For -7:

(-7) × 1 = -7 (-19 < -7 < -6)

For 8:

8 × (-1) = -8 (-19 < -8 < -6)

Arranging the solution: