If two lines (which extend infinitely in each direction) lie on the same plane but never intersect, then the lines are parallel. If the lines somewhere intersect, they are not. And if they intersect at right angles, they are orthogonal, or perpendicular.
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A rhombus has parallel lines but no perpendicular lines.
The letters in the alphabet that contain parallel lines are "H," "I," "K," "N," "X," and "Z." These letters have two or more straight lines that run alongside each other without intersecting. The letter "T" also contains perpendicular lines, as it has one vertical line intersected by a horizontal line at a right angle.
What must be true? In your example, we have 4 intersecting lines. g and b are parallel, and f and h are parallel. g and b are perpendicular to f and h. It might look like tic-tac toe for example
W e
6 uppercase letters: E F G H L T1 lowercase letter: t