//ww:run-exit 3
// Migrated from 700_e2e row 31.
package main;
import os;
fn main() i32 = {
  let s: []u8;
  s.ptr = nil; s.len = 0; s.cap = 0;
  append(s, 88u8); append(s, 89u8); append(s, 90u8);
  os.write(1, s.ptr, len(s): u64);
  os.write(1, "\n".ptr, 1u64);
  return len(s);
};