Write the full names of junior ranked Republicans.
full name refers to official_full_name; junior refers to state_rank = 'junior'; Republicans refers to party = 'Republican'
SELECT T1.official_full_name FROM current AS T1 INNER JOIN `current-terms` AS T2 ON T1.bioguide_id = T2.bioguide WHERE T2.party = 'Republican' AND T2.state_rank = 'junior' GROUP BY T1.official_full_name