Two flags :
1-1 to 1-6, 1-8, 1-10, 2-1, 2-3, 2-6, 2-8, 2-10, 3-1, 4-1, 4-3, 4-6, 4-8, 5-1

Three flags :
1-7, 1-9, 2-2, 2-4, 2-7, 2-9, 3-2, 3-3, 3-5, 3-6, 3-8, 3-10, 4-2, 4-4, 4-7, 4-9, 4-10, 5-2, 5-3, 5-5, 5-6, 5-8

Four flags :
3-4, 3-7, 3-9, 5-4, 5-7, 5-91-10, 2-5, 2-10, 3-10, 4-5, and 5-10 remain the same length