unfinished addition

def add(a,b):
    addition = {'0,0':'0','0,1':'1','0,2':'2','0,3':'3',
    '0,4':'4','0,5':'5','0,6':'6','0,7':'7','0,8':'8',
    '0,9':'9',
    '1,1':'2','1,2':'3','1,3':'4','1,5':'6','1,6':'7',
    '1,7':'8','1,8':'9','1,9':'10',
    '2,2':'4','2,3':'5','2,4':'6','2,5':'7','2,6':'8','2,7':'9',
    '2,8':'10','2,9':'11',
    '3,3':'6','3,4':'7','3,5':'8','3,6':'9','3,7':'10',
    '3,8':'11','3,9':'12',
    '4,4':'8','4,5':'9','4,6':'10','4,7':'11',
    '4,8':'12','4,9':'13',
    '5,5':'10','5,6':'11','5,7':'12','5,8':'13','5,9':'14',
    '6,6':'12','6,7':'13','6,8':'14','6,9':'15',
    '7,7':'14','7,8':'15','7,9':'16',
    '8,8':'16','8,9':'17',
    '9,9':'18'}

    print(a)
    print('+')
    print(b)
    total = {}
    totes = ''
    totey = ''
    a = str(a)
    b = str(b)
    smaller = ''
    bigger = ''
    sum = ''
    smallerDigit = ''
    biggerDigit = ''
    firstSum = ''
    if len(a) <= len(b):
        smaller = smaller + a
        bigger = bigger + b
    else:
        smaller = smaller + b
        bigger = bigger + a
    j = 0
    for i in smaller:
        j -= 1
        print(j)
        if a[j] <= b[j]:
            smallerDigit = a[j]
            biggerDigit = b[j]
        else:
            biggerDigit = a[j]
            smallerDigit = b[j]
        print(smallerDigit)
        print(biggerDigit)
        firstSum = addition[smallerDigit+','+biggerDigit]
        print(firstSum)
        if not len(firstSum) > 1:
            total[j] = firstSum
        else:
            totes = ''
            for jj in sorted(total):
                totes = totes + total[jj]
            totes = str(add(totes,firstSum))
            index = -(len(totes))
            total = {}
            for k in totes:
                total[index] = k
                index += 1

    print(total)
    while len(total) <= len(bigger):
        minDigi =
        minDigi -= 1
        total[minDigi] = '0'
    printe(total)
    for digit in sorted(total):
        totey = totey + total[digit]
    totey = str(add(totey,bigger))
    return int(totey)

print(add(99,2))