def getInt(n):
res=[]
c=0
while(True):
tmp=input()
tmp=tmp.strip()
acc=""
l=len(tmp)
for i in range(l):
if (tmp[i]==' ') | (tmp[i]==','):
if len(acc)>0:
res+=[int(acc)]
c+=1
acc=""
else:
if (tmp[i]>='0') & (tmp[i]<='9'):
acc+=tmp[i]
if len(acc)>0:
res+=[int(acc)]
c+=1
acc=""
if (c>n):
break
return res[:n]
x=getInt(10)
print(str(x))
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
MQoyLAozLDQsNSw2LCwKNyw4LDkgMTAgMTEgMTIK
1
2,
3,4,5,6,,
7,8,9 10 11 12