By ANDREA ROSA and JAMEY KEATEN, Associated Press BAKHMUT, Ukraine (AP) — Holed up in a bombed-out house in eastern Ukraine, Ukrainian troops keep a careful accounting of their ammunition, using a door as a sort of ledger. Scrawled in chalk on the door are figures for mortar shells, smoke shells, shrapnel shells, flares. Despite the heavy influx of weapons from the West, Ukrainian forces are outgunned