#include <bits/stdc++.h>
using namespace std;
int n,xs,ys,xt,yt;
int las[205][205],dis[205][205];
bool vis[205][205];
int q[400005][2],l=1,r=0,ans[400005],cnt=0;
int dx[6]={-2,-2,0,2,2,0};
int dy[6]={-1,1,2,1,-1,-2};
int main (){
	int i;
	scanf ("%d%d%d%d%d",&n,&xs,&ys,&xt,&yt);
	q[++r][0]=xs;q[r][1]=ys;
	while (l<=r)
	{int x=q[l][0],y=q[l][1];l++;
	for (int i=0;i<6;i++)
	{if (x+dx[i]<0||x+dx[i]>=n) {continue;}
	if (y+dy[i]<0||y+dy[i]>=n) {continue;}
	if (vis[x+dx[i]][y+dy[i]]) {continue;}
	dis[x+dx[i]][y+dy[i]]=dis[x][y]+1;
	las[x+dx[i]][y+dy[i]]=i;
	vis[x+dx[i]][y+dy[i]]=1;
	q[++r][0]=x+dx[i];
	q[r][1]=y+dy[i];
	}
	}
	if (!vis[xt][yt]) {puts("Impossible");return 0;}
	printf ("%d\n",dis[xt][yt]);
	int ansi=dis[xt][yt];
	for (i=dis[xt][yt];i>=1;i--)
	{ans[i]=las[xt][yt];
	xt-=dx[ans[i]];yt-=dy[ans[i]];
	}
	for (i=1;i<=ansi;i++)
	{if (ans[i]==0) {printf("UL");}
	if (ans[i]==1) {printf("UR");}
	if (ans[i]==2) {printf("R");}
	if (ans[i]==3) {printf("LR");}
	if (ans[i]==4) {printf("LL");}
	if (ans[i]==5) {printf("L");}
	putchar(' ');
	}
	return 0;
}