abc, cu ab si bc patrate perfecte
160,1,2,3,4,5,6,7,8, 9, unde ultima cifra poate fi oricare intre 0 si 9
250,1,2,3,4,5,6,7,8,9
360,1,2,3,4,5,6,7,8,9
49.................................
64..................................
81.....................................
1,2,3,4,5,6,7,8,9_16, unde prima cifra poate fi oricate intre 1 si 9
............................_25
..........................._36
............................._49
.............................._64
................................81
