if __name__=='__main__':
    # mat=['abcde','fghij','klmno','pqrst','uvwxy','z;;;;']
    s=input()
    x=0
    y=0
    for i in s:
        x1=(ord(i)-97)//5
        y1=(ord(i)-97)%5
        if(i=='z'):
            while(x<4):
                x+=1
                print('D',end='')
            while(y>0):
                y-=1
                print('L',end='')
            if(x==4):
                x+=1
                print('D',end='')
        else:
            while(x>x1):
                x-=1
                print('U',end='')
            while(x<x1):
                x+=1
                print('D',end='')
            while(y>y1):
                y-=1
                print('L',end='')
            while(y<y1):
                y+=1
                print('R',end='')
        print('S',end='')