Test 1. Should print 281226646 481 five times. 281226646 481 281226646 481 281226646 481 281226646 481 281226646 481 Test 2. Should print three all-white, then three all-black PBM images P1 7 3 0000000 0000000 0000000 P1 7 3 0000000 0000000 0000000 P1 7 3 0000000 0000000 0000000 P1 17 2 11111111111111111 11111111111111111 P1 17 2 11111111111111111 11111111111111111 P1 17 2 11111111111111111 11111111111111111