# Include <iostream>
# Include <string>
Using namespace STD;
Char Shu [100], cun [50], Zou [50];
Int main ()
{
Int I, j, num, Len, jishu1, jishu2, Duwei, Yiyou, yizou, zouren;
While (CIN> num & num)
{
Memset (Cun, '0', sizeof (Cun ));
Memset (Zou, '0', sizeof (Zou ));
Cin> shu;
Len = strlen (SHU );
Duwei = 0;
Jishu1 = 0;
Jishu2 = 0;
Zouren = 0;
For (I = 0; I <Len; I ++)
{
Yiyou = yizou = 0;
For (j = 0; j <= jishu2; j ++)
If (Shu [I] = Zou [J])
Yizou = 1;
For (j = 0; j <num; j ++)
If (Shu [I] = Cun [J])
{
Duwei = J;
Yiyou = 1;
}
If (jishu1 <num & Yiyou = 0 & yizou = 0)
{
Cun [jishu1] = Shu [I];
Jishu1 ++;
}
Else if (Yiyou = 1)
{
Jishu1 --;
For (j = Duwei; j <jishu1; j ++)
Cun [J] = Cun [J + 1];
}
Else if (jishu1 = num & yizou = 0)
{
Zouren ++;
Zou [jishu2] = Shu [I];
Jishu2 ++;
}
}
If (zouren = 0)
Cout <"all customers tanned successfully." <Endl;
Else
Cout <zouren <"customer (s) removed ed away." <Endl;
}
Return 0;
}