List down the bond type for molecules from molecule id TR000 to TR050.
double bond refers to bond_type = ' = '; single bond refers to bond_type = '-'; triple bond refers to bond_type = '#';
SELECT T2.molecule_id, T2.bond_type FROM molecule AS T1 INNER JOIN bond AS T2 ON T1.molecule_id = T2.molecule_id WHERE T1.molecule_id BETWEEN 'TR000' AND 'TR050'