T_NAME       'x'           (1, 0) (1, 1)
T_OP         '='           (1, 2) (1, 3)
T_STRING     "ur'abc'"     (1, 4) (1, 11)
T_OP         '+'           (1, 12) (1, 13)
T_STRING     "Ur'ABC'"     (1, 14) (1, 21)
T_OP         '+'           (1, 22) (1, 23)
T_STRING     "uR'ABC'"     (1, 24) (1, 31)
T_OP         '+'           (1, 32) (1, 33)
T_STRING     "UR'ABC'"     (1, 34) (1, 41)
T_ENDMARKER  ''            (2, 0) (2, 0)