// expect: 7/
// spec 1.1.3 and 1.5.1: the source-ending backtick ends the unit, the rest is stdin
include rt;
void pn(int x) { rt.put_n(x); rt.put_c(10); }
fn main() { int c = rt.get_c(); pn(c - 'a' + 7); return 0; }
`a