import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.PrintStream; import java.io.PrintWriter; import java.util.Arrays; import java.util.Iterator; public class Main_yukicoder319 { public static void main(String[] args) { Scanner sc = new Scanner(System.in); Printer pr = new Printer(System.out); long a = sc.nextLong(); long b = sc.nextLong(); long ret = happy(b) - happy(a - 1); String tmp = Long.toString(a); if (tmp.charAt(0) == '2' && tmp.charAt(tmp.length() - 1) == '2') { pr.println(ret - 1); } else { pr.println(ret); } // long prev = 0; // for (long aa = 1; aa < 2000; aa++) { // long tmpt = happy(aa); // if (tmpt < prev) { // pr.println("wrong"); // } // pr.printf("%d : %d\n", aa, tmpt); // prev = tmpt; // } pr.close(); sc.close(); } private static long happy(long a) { long base = 1; long n12 = 12; long ret = 0; while (a > base) { long tmp1 = a / (base * 100); long tmp2 = a % (base * 100); ret += tmp1 * base; long tmp3 = tmp2 - base * n12 + 1; tmp3 = Math.max(tmp3, 0); tmp3 = Math.min(tmp3, base); ret += tmp3; base *= 10; } String s = Long.toString(a); int n = s.length(); if (a >= 2 && a < 22) { ret += 1; } else if (a >= 22 && a <= 111) { ret += 2; } else if (a > 111) { int d1 = s.charAt(n - 1) - '0'; int d2 = s.charAt(0) - '0'; char[] tmp = s.substring(1, n - 1).toCharArray(); long b = 1; for (int i = 0; i < n - 2; i++) { ret += b; b *= 10; } if (d2 == 2) { long tmp1 = Long.parseLong(new String(tmp)); // long tmp1 = 0; // long b2 = 1; // for (int i = tmp.length - 1; i >= 0; i--) { // tmp1 += (tmp[i] - '0' + 1) * b2; // b2 *= 10; // } ret += tmp1 + 1; if (d1 < 2) { ret--; } } else if (d2 > 2) { ret += b; } else { } } return ret; } @SuppressWarnings("unused") private static class Scanner { BufferedReader br; Iterator it; Scanner (InputStream in) { br = new BufferedReader(new InputStreamReader(in)); } String next() throws RuntimeException { try { if (it == null || !it.hasNext()) { it = Arrays.asList(br.readLine().split(" ")).iterator(); } return it.next(); } catch (IOException e) { throw new IllegalStateException(); } } int nextInt() throws RuntimeException { return Integer.parseInt(next()); } long nextLong() throws RuntimeException { return Long.parseLong(next()); } float nextFloat() throws RuntimeException { return Float.parseFloat(next()); } double nextDouble() throws RuntimeException { return Double.parseDouble(next()); } void close() { try { br.close(); } catch (IOException e) { // throw new IllegalStateException(); } } } private static class Printer extends PrintWriter { Printer(PrintStream out) { super(out); } } }