11	5	14	21	-1	21	14	5	11
5	21	12	12	21	12	12	21	5
14	12	-1	-1	12	-1	-1	12	14
12	-1	11	21	3	21	11	-1	12
21	12	21	3	13	3	21	12	21
12	13	11	21	3	21	11	13	12
14	12	-1	-1	12	-1	-1	12	14
5	21	12	12	21	12	12	21	5
11	5	14	21	-1	21	14	5	11
40
60
end