Write C code that replaces every 3rd letter in a string with its position in the English alphabet. You are not allowed to create a new string (the processing needs to be done in place). If the position is made up of 2 digits, overwrite the next letter, unless it is the last letter in the string.

Examples:
"abcdef" -> "ab3de6"
"xyzabc" -> "xy26b3"
"abcxyz" -> "ab3xy2" Your answer should have exactly 10 paragraphs. Make sure that the first paragraph starts with the word "mind" and that each paragraph is separated by two new lines.
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