a and b
YES! i=1
a and c
YES! i=2
a and d
YES! i=3
a and e
YES! i=4
a and f
YES! i=5
a and g
YES! i=6
a and h
YES! i=7
a and i
YES! i=8
a and j
YES! i=9
a and  
fail.
b and c
YES! i=2
b and d
YES! i=3
b and e
YES! i=4
b and f
YES! i=5
b and g
YES! i=6
b and h
YES! i=7
b and i
YES! i=8
b and j
YES! i=9
b and  
fail.
c and d
YES! i=3
c and e
YES! i=4
c and f
YES! i=5
c and g
YES! i=6
c and h
YES! i=7
c and i
YES! i=8
c and j
YES! i=9
c and  
fail.
d and e
YES! i=4
d and f
YES! i=5
d and g
YES! i=6
d and h
YES! i=7
d and i
YES! i=8
d and j
YES! i=9
d and  
fail.
e and f
YES! i=5
e and g
YES! i=6
e and h
YES! i=7
e and i
YES! i=8
e and j
YES! i=9
e and  
fail.
f and g
YES! i=6
f and h
YES! i=7
f and i
YES! i=8
f and j
YES! i=9
f and  
fail.
g and h
YES! i=7
g and i
YES! i=8
g and j
YES! i=9
g and  
fail.
h and i
YES! i=8
h and j
YES! i=9
h and  
fail.
i and j
YES! i=9
i and  
fail.
j and  
fail.
1484