st := array(0 .. 9, 0 .. 9,[(3, 5)=6,(2, 5)=9,(1, 5)=5,(0, 9)=5,(0, 4)=3,(9,
9)=9,(9, 4)=4,(8, 9)=7,(8, 2)=5,(7, 7)=7,(7, 2)=0,(6, 7)=5,(6, 2)=6,(5, 7)=8,(
5, 2)=3,(4, 7)=6,(4, 2)=4,(4, 1)=5,(3, 6)=7,(3, 1)=4,(2, 6)=3,(2, 1)=7,(1, 6)=
9,(1, 1)=6,(2, 0)=2,(1, 0)=7,(0, 5)=4,(0, 0)=8,(9, 5)=0,(8, 5)=8,(8, 3)=9,(7,
8)=4,(7, 3)=5,(6, 8)=8,(6, 3)=7,(5, 8)=9,(5, 3)=4,(4, 8)=3,(4, 3)=0,(3, 7)=1,(
3, 2)=9,(2, 7)=0,(2, 2)=8,(1, 7)=4,(1, 2)=1,(0, 6)=0,(0, 1)=1,(9, 6)=5,(9, 1)=
8,(8, 6)=6,(8, 4)=1,(7, 9)=6,(9, 0)=6,(7, 4)=2,(6, 9)=0,(8, 0)=4,(6, 4)=9,(5,
9)=1,(7, 0)=3,(5, 4)=6,(4, 9)=8,(4, 4)=7,(3, 8)=5,(3, 3)=3,(2, 8)=1,(2, 3)=6,(
1, 8)=2,(1, 3)=8,(0, 7)=9,(0, 2)=7,(9, 7)=3,(9, 2)=2,(8, 7)=2,(7, 5)=1,(6, 5)=
3,(5, 5)=7,(4, 5)=2,(3, 9)=2,(3, 4)=8,(2, 9)=4,(2, 4)=5,(1, 9)=3,(1, 4)=0,(0,
8)=6,(0, 3)=2,(9, 8)=7,(9, 3)=1,(8, 8)=0,(8, 1)=3,(7, 6)=8,(7, 1)=9,(6, 6)=4,(
6, 1)=2,(5, 6)=2,(5, 1)=0,(4, 6)=1,(6, 0)=1,(5, 0)=5,(4, 0)=9,(3, 0)=0]);
