Function concat_atom12 

pub fn concat_atom12(
    s1: &str,
    s2: &str,
    s3: &str,
    s4: &str,
    s5: &str,
    s6: &str,
    s7: &str,
    s8: &str,
    s9: &str,
    s10: &str,
    s11: &str,
    s12: &str,
) -> Atom

Creates an Atom as a result of concatenating 12 string slices.