#include<cstdio>
#include<iostream>
#include<cstring>
#define syy myson
using namespace std;
string a;
char x;
int len,num=0,numx=0,sum=0,lnumx=0,lsum=0,rnumx=0,rsum=0,flag=1,i;
double ans;
int Main()
{
	freopen("computer.in","r",stdin);freopen("computer.out","w",stdout);
	cin>>a;
	len=a.size();
	for(i=0;i<len;i++)
	{
		if(a[i]>='a'&&a[i]<='z')
		{
			x=a[i];
			if(i==0)numx++;
			else
			{
			 	numx+=num*flag;
			 	num=0;
			}
		}
		else if(a[i]>='0'&&a[i]<='9')
		{
			num=(num*10+int(a[i])-48);
		}
		else if(a[i]=='+')
		{
			sum+=num*flag;
			num=0;
			flag=1;
		}
		else if(a[i]=='-')
		{
			sum+=num*flag;
			num=0;
			flag=-1;
		}
		else if(a[i]=='=')
		{
			lnumx=numx;
			lsum=sum+num*flag;
			num=0;
			numx=0;
			sum=0;
			flag=1;
		}
	}
	sum=lsum-sum-num*flag;
	numx=numx-lnumx;
	ans=double(sum)/double(numx);
	if(ans==-0)ans=0;
	printf("%c=%0.3lf",x,ans);
	return 0;
}
int main(){;}
int syy=Main();