What is "kostry-litwa"

Kostry-Litwa is a village in the administrative district of Gmina Nowe Piekuty, within Wysokie Mazowieckie County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately west of Nowe Piekuty, south-east of Wysokie Mazowieckie, and south-west of the regional capital Białystok.