//Test case you can try ["foo", {"bar":["baz",null,1.0,2]}]
//Try another examples also
#include<bits/stdc++.h>
using namespace std;
int prettyjson(string s,stack<char> st,int length,int i,int tabs)
{
    if(i<length)
    {
        if((s[i]=='[') || (s[i]=='{'))
        {
            for(int k=0;k<tabs;k++)
            {
                printf("\t");
            }
            printf("%c\n",s[i]);
            tabs++;
            i++;
            st.push(s[i]);
            prettyjson(s,st,length,i,tabs);
        }
        else if((s[i]=='}') || (s[i]==']'))
        {
            st.pop();
            for(int k=0;k<tabs-1;k++)
            {
                printf("\t");
            }
            printf("%c\n",s[i]);
            tabs--;
            i++;
            //printf("%d %d %d %ld\n",i,length,tabs,st.size());
            prettyjson(s,st,length,i,tabs);
        }
        else
        {
            string current;
            for(int k=0;k<tabs;k++)
            {
                printf("\t");
            }
            for(;(s[i]!='{') && (s[i]!='[') && (s[i]!='}') && (s[i]!=']');i++)
            {
                current.push_back(s[i]);
            }
            int l = current.length();
            int io = -1;
            for(int k=0;k<l;k++)
            {
                if(current[k] == ' ')
                {
                    io = k;
                    break;
                }
            }
            if(io>=0)
            {
                current.erase(current.begin() + io);
            }
            l = current.length();
            for(int k=0;k<l;k++)
            {
                if(current[k]==',')
                {
                    printf("%c\n",current[k]);
                    if(k!=l-1)
                    {
                        for(int h=0;h<tabs;h++)
                        {
                            printf("\t");
                        }
                    }
                }
                else
                {
                    if(k==l-1)
                    {
                        printf("%c\n",current[k]);
                    }
                    else
                    {
                        printf("%c",current[k]);
                    }
                    
                }
            }
            //printf("\n");
           // cout << current << endl;
            current.erase();
            prettyjson(s,st,length,i,tabs);
        }
    }
    else
    {
        return 0;
    }
    return 0;
}
int main()
{
    string s;
    getline(cin,s);
    int length = s.length();
    //cout << length << endl;
    stack <char> st;
    string current;
    prettyjson(s,st,length,0,0);
    return 0;
}