135 (((xxxxx)\3\3)\2\2)\1\1
363 ((x+)\2(?=\2$)x){xxxxx}$
1092 ((x+)\2(?=\2$)x){xxxxxx}$
3279 ((x+)\2(?=\2$)x){xxxxxxx}$
9840 ((x+)\2(?=\2$)x){xxxxxxxx}$
29523 ((x+)\2(?=\2$)x){xxxxxxxxx}$
88572 ((x+)\2(?=\2$)x){xxxxxxxxxx}$
349524 ((x+)\2\2(?=\2$)x){xxxxxxxxx}$