#define MSB(v) fprintf(stderr," %s", (v))
#define MR(v) fprintf(stderr," %s=%d,%d..%d,%d",\
#v,(v).tl.x,(v).tl.y,(v).br.x,(v).br.y)
#define MSB(v) fprintf(stderr," %s", (v))
#define MR(v) fprintf(stderr," %s=%d,%d..%d,%d",\
#v,(v).tl.x,(v).tl.y,(v).br.x,(v).br.y)