The document lists the numbers 1 through 15 next to "of 2x2", indicating 15 sets of 2 by 2 items numbered from 25 to 39. It then lists the numbers 1 through 8 next to "of 3x3", indicating 8 sets of 3 by 3 items numbered from 40 to 47. Finally, it lists the numbers 1 through 3 next to "of 4x4", indicating 3 sets of 4 by 4 items numbered from 48 to 50.