# test puzzle #1
010083000089000020200001600000100509400070006605002000008700002030000740000320050
# test puzzle #2
020007000004050900000349500080030690600902005059010070008725000007060100000100020
# test puzzles
006000002000009000082040070015084030009205100030190280040070620000300000300000800
900020000020905004004000050008402097001000400450309600030000900500106030000050006
600004007080090500020603080000200040106000802040008000070809020009030060300400009
