import csv

def isEmpty(lst):
    for i in lst:
        if i:
            return False
    return True

def removeEmpty(tbl):
    for i in tbl:
        if isEmpty(i):
            tbl.remove(i)
    return tbl

def splitAndSort(column):
    column_tmp = []
    for i in column:
        i = i.replace("+", " ").split(" ")
        i.sort()
        if i.count(''):
            i.remove('')
        if not column_tmp.count(i):
            column_tmp.append(i)
    return column_tmp

def removeFromCol2(col1, col2):
    for i in col1:
        if col2.count(i):
            col2.remove(i)
    return col2

table = []

for i in csv.reader(open("/home/alexander/test/python/input.csv")):
    if not isEmpty(i):
        table.append(i)

print table
table = removeEmpty(zip(*table))
print table
table = [splitAndSort(i) for i in table]
print table

result = [table[0]]
for i in range(0, len(table)-1):
    result.append(removeFromCol2(table[i], table[i+1]))

print result