import bisect
import copy
import decimal
import fractions
import heapq
import itertools
import math
import random
import sys
import time
from collections import Counter,deque,defaultdict
from functools import lru_cache,reduce
from heapq import heappush,heappop,heapify,heappushpop,_heappop_max,_heapify_max
def _heappush_max(heap,item):
    heap.append(item)
    heapq._siftdown_max(heap, 0, len(heap)-1)
def _heappushpop_max(heap, item):
    if heap and item < heap[0]:
        item, heap[0] = heap[0], item
        heapq._siftup_max(heap, 0)
    return item
from math import gcd as GCD
read=sys.stdin.read
readline=sys.stdin.readline
readlines=sys.stdin.readlines
write=sys.stdout.write

A,B,C=map(int,readline().split())
for ans in range(1,10**4):
    for a in range(A+1):
        for b in range(B+1):
            r=a+10*b-ans
            if r>=0 and r//10+r%10+A-a+B-b==C:
                break
        else:
            continue
        break
    else:
        continue
    break
else:
    ans="Impossible"
print(ans)