The Irish city of Tralee has 6 letters and is the county town of County Kerry. It is located on the northern side of the neck of the Dingle Peninsula. Derry, with 5 letters, is the second-largest city in Northern Ireland and the fourth-largest city on the island of Ireland. CORK, with 4 letters, is the third-largest city in Ireland and the largest city in the province of Munster. Sligo, with 5 letters, is a coastal seaport and the county town of County Sligo in the Republic of Ireland.