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The '4' is open.
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The 'l' (lower-case 'L') has a right-facing lower serif or tail.
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The lower-case 'e' has a straight horizontal bar.
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Note that the fonts in the icons shown above represent general examples, not necessarily the two fonts chosen for comparison.
Show Examples
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The '4' is closed.
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The 'l' (lower-case 'L') has no serifs or tail.
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The lower-case 'e' has a curved bar with no straight segment.
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