# Write code that takes a two dimensional list of integers
# of at least size two, and finds the minimum and
# next minimum integer in this two dimensional list.
# You are guaranteed that all numbers in the list are unique.
# Return the two numbers with a dash between them;
# for example, if the incoming list is [[2,3][1,4]]
# you would return 1-2.
# You may not use any built-in functions/methods besides len().

def min(l1):
    list1 = l1
    result = ""

    min1 = 0
    min2 = 0
    i1 = 0
    while i1 < len(list1):
        temp = list1[i1]
        if len(temp) > 0:
            min1 = temp[0]

        i2 = 0
        while i2 < len(temp):
            if temp[i2] < min1:
                min1 = temp[i2]
            elif temp[i2] > min1:
                min2 = temp[i2]
            i2 = i2 + 1

        i1 = i1 + 1

    i1 = 0
    while i1 < len(list1):
        temp = list1[i1]
        i2 = 0
        while i2 < len(temp):
            if temp[i2] > min1 and temp[i2] < min2:
                min2 = temp[i2]
            i2 = i2 + 1

        i1 = i1 + 1

    result = str(min1) + str("-") + str(min2)

    return result


print(min([[2,3],[1,4]]))