%%

    //P1:
//a+/aab

    //P2:
//a*/aaap

    //P3
//a*/aaa

    //P4
//(a|ab)+/(a|ba)+

    //P5
//(a|ab)*/(a|ba)*

    //P6
//(a|ab)+/a(a|ba)+

    //P7
//a+/(a|ab)+

    //P8
//a*/a*

    //P9
//a*/(ab)*

    //P10
//a*b*/a*

    //P11
//a*/aa+

