ab0ab=a*10000+b*1000+0+a*10+b=
10010a+1001b
abc0abc=a*1000000+b*100000+c*10000+0+a100+b10+c=
1000100a+100010b+10001c
Se simplifica si ne ramane 1 supra 100a, 10b,1001c
