# This puzzle is solvable
7
 1  2  3  5 27  6  7
24 25 26  4 28 29  8
23 40 41 42 43  9  0
22 39 48 46 31 30 10
21 38 47 45 44 32 11
20 37 36 35 34 33 12
19 18 17 16 15 14 13