fn nir_at(chars: &[char], start: usize) -> Option<(usize, String)>Expand description
A French social security number (NIR): 15 characters, the first 1, 2, 7 or 8, the last two its key, 97 less the first thirteen modulo 97; Corsica’s departments, 2A and 2B, count as 19 and 18 in the key.