Hundreds of fighters may clamber_up rugged mountains.Logical formLearned from4 sentences. An eastern region can be rugged.Logical formLearned from4 sentences. A (fishing region) can be rugged.Logical formLearned from4 sentences. Freighters can be rugged.Logical formLearned from4 sentences. A parkland can be rugged.Logical formLearned from4 sentences. An (island nation) can be rugged.Logical formLearned from4 sentences. Roads may run through rugged mountains.Logical formLearned from4 sentences. Tackles can be rugged.Logical formLearned from4 sentences. Forwards can be rugged.Logical formLearned from4 sentences. A win can be rugged.Logical formLearned from4 sentences. A (frontier zone) can be rugged.Logical formLearned from4 sentences. Deserts can be rugged.Logical formLearned from4 sentences. Bunkers can be rugged.Logical formLearned from4 sentences. A centre-half can be rugged.Logical formLearned from4 sentences. Nautilus can be rugged.Logical formLearned from4 sentences.