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What part of "Hello World in Brainfuck" don't you understand - Black on White

This design consists of the text pieces "What part of" and "don't you understand?" in an all-caps font centered horizontally and the code to print "Hello World!" and a newline to the screen in the esoteric programming language Brainfuck. The source code is from the corresponding Wikipedia page The design is available in black on white on different products. For apparel such as shirts, long-sleeves or hoodies other colors can be chosen.

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Design published: by Ramiro Gómez
This design is available from the shops linked above. Available product options (size, color, type) and buying conditions differ across stores, so be sure to review them before you buy a product.

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