a,1,0.5,,abcd
b,2,0.5,,efgh
c,3,0.5,,ijkl
d,4,0.5,,mnop
d,5,0.5,,qrst
f,6,0.5,,uvwx
g,7,0.5,,yzab
h,8,0.5,,cdef
i,9,0.5,,ghij
g,10,0.5,,klmn