#if 1
#include<stdio.h>
                    int n,u;int main(){while((n=getchar())>0)u=.0+u+(n-93?n-91?u<0?putchar((5^(n+2))%123)*0:0:1:-1     );return 0;}
#endif

#if 0
$jodmvef=tuejp/i?\13
                    jou!o-v<jou!nbjo)*|xijmf))o>hfudibs)**?1*v>/1,v,)o.:4@o.:2@v=1@qvudibs))6_)o,3**&234*+1;1;2;.2     *<sfuvso!1<~

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#endif