import std.conv, std.functional, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.container, std.math, std.numeric, std.range, std.regex, std.typecons;
import core.bitop;

class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }
real readReal() { return readToken.to!real; }

bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }

int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }




void main() {
  try {
    for (; ; ) {
      const A = readLong();
      const B = readLong();
      
      long ans;
      
      // [12 10^k, 13 10^k) mod 10^(k+2)
      foreach (k; 0 .. 13) {
        long tmp;
        tmp += B       / 10L^^(k + 2) * 10L^^k + min(max(B       % 10L^^(k + 2) - 12 * 10L^^k + 1, 0), 10L^^k);
        tmp -= (A - 1) / 10L^^(k + 2) * 10L^^k + min(max((A - 1) % 10L^^(k + 2) - 12 * 10L^^k + 1, 0), 10L^^k);
        ans += tmp;
      }
      
      // 1 and 2
      if (A <= 1 && 2 <= B) {
        ans += 1;
      }
      
      // [2 10^(k+1) + 2, 3 10^(k+1) + 2), 2 mod 10
      foreach (k; 0 .. 13) {
        long tmp;
        if (B >= 2) {
          tmp += min(max((B - 2) / 10 - 2 * 10L^^k + 1, 0), 10L^^k);
        }
        if (A >= 2) {
          tmp -= min(max((A - 2) / 10 - 2 * 10L^^k + 1, 0), 10L^^k);
        }
        ans += tmp;
      }
      
      writeln(ans);
    }
  } catch (EOFException e) {
  }
}