#include<iostream>
using namespace std;
#include<vector>
#include<string>
int main()
{
  int n,x1,x2,y1,y2,i,cnt=0;
  cin>>n>>x1>>y1>>x2>>y2;
  if(x1<x2 && y1>y2)
  { int j;
    //cout<<"ll and l";
    for( i=x1,j=y1;i<x2;i+=2,j-=1)
    {
      cnt++;
    }
    if(i!=x2)
    cout<<"Impossible";
    else
    {
      int cnt1=0;
      for(i=j;i>y2;i-=2)
      {
        cnt1++;
      }if(i==y2)
      {
        cout<<cnt+cnt1<<endl;
        for(i=0;i<cnt;i++)
        {
          cout<<"LL ";
        }
        for(i=0;i<cnt1;i++)
        {
          cout<<"L ";
        }
      }else cout<<"Impossible";
    }
  }
  else if(x1>x2 && y1>y2)
  {
    int j;
      //cout<<"ul and l";
      for( i=x1,j=y1;i>x2;i-=2,j-=1)
      {
        cnt++;
      }
      if(i!=x2)
      cout<<"Impossible";
      else
      {
        int cnt1=0;
        for(i=j;i>y2;i-=2)
        {
          cnt1++;
        }
        if(i==y2)
        {
          cout<<cnt+cnt1<<endl;
          for(i=0;i<cnt;i++)
          {
            cout<<"UL ";
          }
          for(i=0;i<cnt1;i++)
          {
            cout<<"L ";
          }
        }else cout<<"Impossible";
      }
  }
  else if(x1==x2 && y1>y2)
  {
    //cout<<"l";
    for(i=y1;i>y2;i-=2)
    {
      cnt++;
    }if(i==y2)
    {
      cout<<cnt<<endl;
      for(int i=0;i<cnt;i++)
      {
        cout<<"L"<<endl;
      }
    }else cout<<"Impossible";
  }
  else if(x1<x2 && y1<y2)
  {
    //cout<<"dr and r";
    int j;
      for( i=x1,j=y1;i>x2;i+=2,j+=1)
      {
        cnt++;
      }
      if(i!=x2)
      cout<<"Impossible";
      else
      {
        int cnt1=0;
        for(i=j;i<y2;i+=2)
        {
          cnt1++;
        }
        if(i==y2)
        {
          cout<<cnt+cnt1<<endl;
          for(i=0;i<cnt;i++)
          {
            cout<<"LR ";
          }
          for(i=0;i<cnt1;i++)
          {
            cout<<"R ";
          }
        }else cout<<"Impossible";
      }
  }
  else if(x1>x2 && y1<y2)
  {
    //cout<<"ur and r";
    int j;
      for( i=x1,j=y1;i>x2;i-=2,j+=1)
      {
        cnt++;
      }
      if(i!=x2)
      cout<<"Impossible";
      else
      {
        int cnt1=0;
        for(i=j;i>y2;i-=2)
        {
          cnt1++;
        }
        if(i==y2)
        {
          cout<<cnt+cnt1<<endl;
          for(i=0;i<cnt;i++)
          {
            cout<<"UR ";
          }
          for(i=0;i<cnt1;i++)
          {
            cout<<"R ";
          }
        }else cout<<"Impossible";
      }

  }
  else if(x1==x2 && y1<y2)
  {
    //cout<<"r";
    for( i=y1;i<y2;i+=2)
    {
      cnt++;
    }if(i==y2)
    {
      cout<<cnt<<endl;
      for( i=0;i<cnt;i++)
      {
        cout<<"R"<<endl;
      }
    }else cout<<"Impossible";
  }
  else if(x1==x2&&y1==y2)
  {
    cout<<"0";
  }


  else if(y1==y2&&x1<x2)
  {
    //cout<<"ll and lr";
    for( i=0;i<x2;i+=4)
    {
      cnt++;
    }
    if(i==x2){
    cout<<2*cnt<<endl;
    for( i=0;i<cnt;i++)
    {
      cout<<"LR LL "<<endl;
    }}
    else
    cout<<"Impossible";
  }

    else if(y1==y2&&x1>x2)
    {
      //cout<<"ur and ul";
      for( i=x1;i>x2;i-=4)
      {
        cnt++;
      }if(i==x2){cout<<2*cnt<<endl;
      for(i=0;i<cnt;i++)
      {
        cout<<"UL UR ";
      }}
      else cout<<"Impossible";
    }
}