.i 9
.o 15
.s 5
---------   1    2  100000000000000
---------   2    3  010000000000000
0--------   3    4  001000000000000
1--------   3    5  001000000000000
---------   4    1  000100000000000
-0-------   5    6  000000000000000
-1-------   5    7  000000000000000
---------   6    1  000010000000000
--0------   7    8  000000000000000
--1------   7   10  000000000000000
---------   8    9  000001000000000
---------   9    1  000000100000000
---1-----  10   11  000000000000000
---0-----  10   13  000000000000000
---------  11   12  000000010000000
---------  12   13  010000000000000
----0----  13   14  000000000000000
----1----  13   15  000000000000000
---------  14   16  000000001000000
---------  15   16  000000000100000
-----0---  16   17  000000000000000
-----1---  16   0  000000000000000
------0--  17   18  000000000000000
------1--  17   25  000000000000000
-------0-  18   19  000000000000000
-------1-  18   23  000000000000000
--------0  19   20  010000000000000
--------1  19   21  010000000000000
---------  20    1  000000100000000
---------  21   22  000000000010000
---------  22    1  000000000001000
---------  23   24  000000000000100
---------  24    1  000000000001000
---------  25    1  000000000000010
---------  0    1  000000000000001