a
aa
aaa
aaaa

a b a
aa b aa
aaa b aaa
aaaa c aaaaa

a d a b aa
a d aa b aaa
aaa d aa b aaaaa
aaa d aaa b aaaaaa

a e a b a
a e aa b aa
aaa e aa b aaaaaa
aaa e aaa b aaaaaaaaa

aa f a b aa
aa f aa b aaaa
aa f aaa b aaaaaaaa
aaa f aa b aaaaaaaaa

aaa f aa d aaaa f aa b aaaaa f aa




Was steht in der letzten Zeile?
(Lösung)