import std.conv, 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; }

void chmin(T)(ref T t, in T f) { if (t > f) t = f; }
void chmax(T)(ref T t, in T f) { if (t < f) t = f; }

int binarySearch(T)(in T[] as, in bool delegate(T) test) { int low = -1, upp = cast(int)(as.length); for (; low + 1 < upp; ) { int mid = (low + upp) >> 1; (test(as[mid]) ? low : upp) = mid; } return upp; }
int lowerBound(T)(in T[] as, in T val) { return as.binarySearch((T a) => (a < val)); }
int upperBound(T)(in T[] as, in T val) { return as.binarySearch((T a) => (a <= val)); }


int N;
int K;
int[] X, Y;
int[] A;

void main() {
  try {
    for (; ; ) {
      N = readInt();
      K = readInt();
      X = new int[K];
      Y = new int[K];
      foreach (k; 0 .. K) {
        X[k] = readInt() - 1;
        Y[k] = readInt() - 1;
      }
      A = new int[N];
      foreach (i; 0 .. N) {
        A[i] = readInt() - 1;
      }
      
      auto a = A.dup;
      foreach (k; 0 .. K) {
        swap(a[X[k]], a[Y[k]]);
      }
      debug {
        writeln("a = ", a);
      }
      
      int[] ans;
      foreach (_; 0 .. N) {
        foreach (i; 0 .. N - 1) {
          if (a[i] > a[i + 1]) {
            swap(a[i], a[i + 1]);
            ans ~= i;
          }
        }
      }
      writeln(ans.length);
      foreach (i; ans) {
        writeln(i + 1, " ", i + 2);
      }
    }
  } catch (EOFException e) {
  }
}