from typing import List

def separate(data: List[int], k: int) -> List[List[int]]:

    returnList = []
    returnList.append(data)

    for i in range (k-1):
        biggestGap = 0
        subarr = [0,0]
        for j in range (len(returnList)):
            for k in range(1,len(returnList[j])):
                if( returnList[j][k] - returnList[j][k-1] > biggestGap):
                    biggestGap = returnList[j][k] - returnList[j][k-1]
                    subarr = [j,k]
        tmp = returnList[subarr[0]]

        tmp2 = []
        for i in range (subarr[1]):
            tmp2.append(tmp[i])
        tmp3 = []
        for i in range (subarr[1],len(tmp)):
            tmp3.append(tmp[i])

        returnList.remove(tmp)
        returnList.append(tmp2)
        returnList.append(tmp3)

    returnList = sorted(returnList,key = lambda x : x[0])
    return returnList



bla = [10,12,45,47,91,98,99]
bla = separate(bla,3)
print(bla)