1 ai1.txt

     2 bi1.txt

     3 ci1.txt

     4 di1.txt

     5 ai2.txt

     6 bi2.txt

     7 ci2.txt

     8 di2.txt

     9 ai3.txt

    10 bi3.txt

    11 ci3.txt

    12 di3.txt

    13 ei3.txt

    14 fi3.txt