public class M1 answer

{ public static String reverse1(String str)

{ return new StringBuffer(str).reverse().toString(); }

public static int reverse(int n)

{ int ret = 0; String bString = String.valueOf(n); bString = reverse1(bString); ret = Integer.parseInt(bString); return ret; }

public static int palindroCount(int n)

{ int ret = 0; int re = reverse(n); while(re!=n)

{ if(ret>=10) return -1; n = re + n; ret++; re = reverse(n); } return ret; } public static void main(String[] args)

{ int n = 159; System.out.println(palindroCount(n)); } }