State what should be written in place of the labels L1, L2, and L3 in the algorithm below to successfully identify and output the weather station with the highest recorded temperature.

SUBROUTINE analyzeTemperatures(type, totalStations)
    readings ← [['Station A', 'Station B', 'Station C', 'Station D', 'Station E'],
                ['14.2', '-3.5', '22.1', '18.9', '-1.2']]
    idx ← 0
    maxTemp ← -100.0
    IF type = 'MAXIMUM' THEN
        FOR j ← 0 TO totalStations - 1
            temp ← STRING_TO_FLOAT(readings[L1][j])
            IF temp > maxTemp THEN
                maxTemp ← temp
                idx ← L2
            ENDIF
        ENDFOR
    ELSE
        OUTPUT 'Mode not supported'
    ENDIF
    IF maxTemp ≠ -100.0 THEN
        OUTPUT 'Highest temperature at ', readings[0][idx], ' is ', readings[1][idx], '°C'
    ENDIF
ENDSUBROUTINE

OUTPUT 'Enter MAXIMUM or MINIMUM: '
userMode ← USERINPUT
analyzeTemperatures(L3, 5)