start 
t01 
t02 
t03 
t04 
t05 
t06 
t07 
t08 
t09 |
|||||
a_1 
a_2 
a_3 
a_4 |
b_1 
b_2 
b_3 
b_4 |
c_1 
c_2 
c_3 |
|||
aa1 
aa2 |
ab1 
ab2 |
ba1 
ba2 
ba3 |
bb1 
bb2 
bb3 |
ca_1 
ca2 |
cb_1 
cb2 |
aend |
|||||
t10 
t11 
t12 
end |
|||||
©2000 CTW