State what should be written in place of the labels L1 to L3 in the algorithm below to make it function correctly.

SUBROUTINE findHighestStock(searchMode, totalItems)
    inventory ← [['Espresso', 'Latte', 'Chai', 'Mocha', 'Tea'],
                 ['12', '45', '22', '8', '31']]
    pos ← 0
    maxStock ← -1
    IF searchMode = 'MAX' THEN
        FOR i ← 0 TO totalItems - 1
            quantity ← STRING_TO_INT(inventory[L1][i])
            IF quantity > maxStock THEN
                maxStock ← quantity
                pos ← L2
            ENDIF
        ENDFOR
    ELSE
        OUTPUT 'Feature coming soon'
    ENDIF
    IF maxStock ≠ -1 THEN
        OUTPUT inventory[0][pos], ' has stock of ', inventory[1][pos]
    ENDIF
ENDSUBROUTINE

OUTPUT 'Enter search mode (MAX or MIN): '
searchMode ← USERINPUT
findHighestStock(L3, 5)

L1:

L2:

L3: