#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

int main()
{
	char str[10000]; //get huge amount of data
	double numbers[10000][10]; // fill the numbers
	int nnumbers=0;
	double means[200];
	double variances[200];
	double std[200];
	int nparts=0;
	while (fgets(str,199,stdin)!=NULL)
	{
		nparts=0;
		char *tok=strtok(str,",\n");
		do
		{
			numbers[nnumbers][nparts]=atof(tok);
			nparts++;
		}
		while((tok=strtok(NULL,",\n"))!=NULL);
		nnumbers++;
	} // load data
	for (int j=0;j<nparts;j++)
		means[j]=variances[j]=std[j]=0;
	for (int i=0;i<nnumbers;i++)
	{
		for (int j=0;j<nparts;j++)
			means[j]+=numbers[i][j];
	}
	for (int j=0;j<nparts;j++)
		means[j]/=nnumbers;
	for (int i=0;i<nnumbers;i++)
	{
		for (int j=0;j<nparts;j++)
			variances[j]+=(numbers[i][j]-means[j])*(numbers[i][j]-means[j]);
	}
	for (int j=0;j<nparts;j++)
	{
		variances[j]/=nnumbers;
		std[j]=sqrt(variances[j]);
	}
	for (int j=0;j<nparts;j++)
		printf("%lf,",means[j]);
	printf("\n");
}