#include <stdio.h>
#define i stdin
#define o stdout

enum state { ignw, iwas, prpr, stmt, inqt } nfa;

int c,tabs=0,fscc=0;

int cprint(int t) {
    for (;t--;) putc('\t',o);
}

main(s,v) {
    while ((c=getc(i))!=EOF) {
        switch (c) {
        case  ' ':
        case '\t':
        case '\r':
        case '\v':
        case '\f':
        case '\n':
            switch (nfa) {
            case stmt:
                nfa=iwas;
            case iwas:
            case ignw:
                continue;
            case prpr:
                nfa=(c-'\n')?nfa:ignw;
            }
            break;
        case '\\':
            switch (nfa) {
            case inqt:
                putc(c,o);
                c=getc(i);
            }
            break;
        case '\'':
        case '\"':
            switch (nfa) {
            case inqt:
                nfa=stmt;
                break;
            case iwas:
                putc(' ',o);
            case ignw:
            case stmt:
                nfa=inqt;
            }
            break;
        case '#':
            switch (nfa) {
            case inqt:
                break;
                default  :
                nfa=prpr;
            }
            break;
        case ';':
            if (fscc && fscc--) {
                if (nfa==iwas)
                    putc(' ',o);
                break;
            }
            switch (nfa) {
            case ignw:
                cprint(tabs);
            case stmt:
            case iwas:
                puts(";");
                nfa=ignw;
                continue;
            }
            break;
        case '{':
        case '}':
            switch (nfa) {
            case stmt:
            case iwas:
                puts("");
            case ignw:
                cprint((c-'{')?--tabs:tabs++);
                putc(c,o);
                puts("");
                nfa=ignw;
                continue;
            }
            break;
        case 'f':
            switch (nfa) {
            case iwas:
                putc(' ',o);
            case ignw:
                (nfa==ignw) && cprint(tabs);
                nfa=stmt;
                putc(c,o);
                switch (c=getc(i)) {
                case 'o':
                    putc(c,o);
                    switch (c=getc(i)) {
                    case 'r':
                        fscc=2;
                        break;
                        default :
                        ungetc(c,i);
                        continue;
                    }
                    break;
                    default :
                    ungetc(c,i);
                    continue;
                }
            }
            break;
        default:
            switch (nfa) {
            case iwas:
                nfa=stmt;
                putc(' ',o);
                break;
            case ignw:
                nfa=stmt;
                cprint(tabs);
                break;
            }
            break;
        }
        putc(c,o);
    }
}