<aaa> belepbl
<aaa> blepbep
<bbb> ththhtht
<aaa> blebp
<aaa> blebpebl
<aaa> belbepbebleb
<aaa> eblebpe
<bbb> thtttth
<aaa> blebp
<aaa> blebpe
<aaa> blbebpe
<aaa> blelblb
<bbb> ththtt
<aaa> bleblbel
<aaa> bbllel
<aaa> blebep
<bbb> thththth
<aaa> blebe
<aaa> blebp