How can I style a css order list

How can I style a css order list to display 1-2, 3-4, 5-6, 7-8 etc - Stack Overflow
I want to output like so:1-2 number one3-4 number two5-6 number threeThis is my HTML-CSS code which
How can I style a css order list to display 12345678 etcStack Overflow
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