FAIL: Cell: new Cell wit argument X returns mark.
PASS: Cell: new Cell wit argument X returns mark.
FAIL: Cell: new Cell wit argument _ returns blank.
PASS: Cell: new Cell wit argument _ returns blank.
FAIL: Cell: new Cell wit argument ? returns empty.
PASS: Cell: new Cell wit argument ? returns empty.
FAIL: Cell: new Cell wit bad argument returns...

FAIL: Cell: new Cell wit bad argument returns empty.
PASS: Cell: new Cell wit bad argument returns...

PASS: Cell: new Cell wit bad argument returns empty.