process.stdin.resume();
process.stdin.setEncoding('ascii');

var input_stdin = "";
var input_stdin_array = "";
var input_currentline = 0;

process.stdin.on('data', function (data) {
    input_stdin += data;
});

process.stdin.on('end', function () {
    input_stdin_array = input_stdin.split("\n");
    main();    
});

function readLine() {
    return input_stdin_array[input_currentline++];
}

/////////////// ignore above this line ////////////////////

function printShortestPath(n, r_start, c_start, r_end, c_end) {
    // Print the distance along with the sequence of moves.    
    var rowDiff = Math.abs(r_start - r_end);
    var colDiff = Math.abs(c_start - c_end);
    var rowMove = Math.floor(rowDiff/2);
    var colMove = 0;    
    var L = 0;
    var R = 0;
    var UL = 0;
    var UR = 0;
    var LL = 0;
    var LR = 0;
        
    /* Check destination */
    if (rowDiff%2 == 0) {
        /* Possible */
        if (c_start > c_end) {
            if (r_start < r_end) {
                /* 3 Quadrant */
                colMove = Math.abs(c_start - rowMove - c_end)/2;
                if (!Number.isInteger(colMove))
                    console.log("Impossible");
                else {
                    LL += rowMove;
                    L += colMove;
                }
            } else if (r_start == r_end) {
                /* left axis x */
                colMove = Math.abs(c_start-c_end)/2;
                if (!Number.isInteger(colMove))
                    console.log("Impossible");
                else
                    L += colMove;
            } else {
                /* 2 Quadrant */
                colMove = Math.abs(c_start - rowMove - c_end)/2;
                if (!Number.isInteger(colMove))
                    console.log("Impossible");
                else {
                    UL += rowMove;
                    L += colMove;
                }
            }
        } else if (c_start == c_end) {
            /* Axis y */            
            if (r_start < r_end) {
                /* Down */
                rowMove = rowDiff/4;
                if (!Number.isInteger(rowMove))
                    console.log("Impossible");
                else {
                    LR += rowMove;
                    LL += rowMove;
                }
            } else if (r_start == r_end) {
                /* It's me */
                rowMove = 0;
                colMove = 0;
            } else {
                /* Up */
                rowMove = rowMove/2;
                if (!Number.isInteger(rowMove))
                    console.log("Impossible");
                else {
                    UL += rowMove;
                    UR += rowMove;
                }
            }            
        } else {
            if (r_start < r_end) {
                /* 4 Quadrant */
                colMove = Math.abs(c_start + rowMove - c_end)/2;
                if (!Number.isInteger(colMove))
                    console.log("Impossible");
                else {
                    LR += rowMove;
                    R += colMove;
                }
            } else if (r_start == r_end) {
                /* right axis x */
                colMove = Math.abs(c_start-c_end)/2;
                if (!Number.isInteger(colMove))
                    console.log("Impossible");
                else
                    R += colMove;
            } else {
                /* 1 Quadrant */
                colMove = Math.abs(c_start + rowMove - c_end)/2;
                if (!Number.isInteger(colMove))
                    console.log("Impossible");
                else {
                    UR += rowMove;
                    R += colMove;
                }
            }
        }   
        printPath(L, R, UL, UR, LL, LR);
    } else {        
        console.log("Impossible");
    }
    //console.log("L=", L, "R=", R, "UL=", UL, "UR=", UR, "LL=", LL, "LR=", LR);    
}

function printPath(L, R, UL, UR, LL, LR) {
    console.log(L+R+UL+UR+LL+LR);    
    
    /* Priority: UL, UR, R, LR, LL, L */
    let str = "";
    if (UL != 0) {
        while (UL-->0)
            str += "UL ";
    } 
    
    if (UR != 0) {
        while (UR-->0)
            str += "UR ";
    } 
    
    if (R != 0) {
        while (R-->0)
            str += "R ";
    } 
    
    if (LR != 0) {
        while (LR-->0)
            str += "LR ";
    } 
    
    if (LL != 0) {
        while (LL-->0)
            str += "LL ";
    } 
    
    if (L != 0) {
        while(L-->0)
            str += "L";
    }    
    
    console.log(str);
}

function main() {
    var n = parseInt(readLine());
    var i_start_temp = readLine().split(' ');
    var i_start = parseInt(i_start_temp[0]);
    var j_start = parseInt(i_start_temp[1]);
    var i_end = parseInt(i_start_temp[2]);
    var j_end = parseInt(i_start_temp[3]);
    printShortestPath(n, i_start, j_start, i_end, j_end);
}