Test passes if ...
- the bottom of glyph 'L' is touching a thin blue line in each 7 orange rectangles and
- all 7 orange rectangles are identical.
LLLLABCD
LLLL
LLLLLLLLL
LLLLABCD
LLLL
LLLLLLLLL
LLLLABCD
LLLL
LLLLLLLLL
LLLLABCD
LLLL
LLLLLLLLL
LLLLABCD
LLLL
LLLLLLLLL
LLLLABCD
LLLL
LLLLLLLLL
LLLLABCD
LLLL
LLLLLLLLL