[CG] Thor solution (obfuscated, artsy)

#define M main
#define S scanf
#define P puts
#define C char
#define F for
#define D "%d"

M(p,q,r,s)    {C   t[3     ]=    ""
    ,*        u=   t+1   ;S  (   D D
    D         D,   &p,  &q    ,  &  r
    ,&        s)   ;F(  ;;    )  *   t
    =*        u= 0,s^q   &&  (   *  t
    =s        <q   ?(     ++s    ,83
    ):        (    --s     ,     78)
    ),        r^   p&&           ( *
    u=        r<   p?            ( ++
    r,        69   ):            (  --
    r,        87   ))            ,   P(
    *t        ?t   :u            )    ;}