i64 write(i32, ptr i8, u64) {
    `scsbsa`
    syscall3(i64(1), `la` as i64, `lb` as i64, `lc` as i64)
}

i64 read(i32, ptr i8, u64) {
    `scsbsa`
    syscall3(i64(0), `la` as i64, `lb` as i64, `lc` as i64)
}

i32 open(ptr i8, i32, i32) { 
    `scsbsa`
    syscall3(i64(2), `la` as i64, `lb` as i64, `lc` as i64)
    as i32
}

void exit(i32) {
    as i64 i64(231) rev
    syscall1 trash
}

void putc(i8) {
    array i8[1] `dstr` store 
    write(1, `lt`, u64(1)) trash
}

u64 strlen(ptr i8) {
    dup while(dup load i8(0) !=) { 1+ } `r-`
}

void print(ptr i8) {
    1 rev dup strlen write trash
}

void println(ptr i8) {
    print i8(10) putc
}

void printnum(i32) {
 
    if (dup 0 ==) {
        putc('0')
    } else if (dup 0 <) {
        `0r-` '-' putc
    }

    array i8[11] 10+ dup i8(0) store -1+ `sb`

    while (dup 0 !=) {
        10 divmod 48+ as i8 
        `lb` rev store 
        `lb` -1+ `sb`
    } trash
    print(`lb`1+)

}

void printnum64(u64) {
 
    if (dup u64(0) ==) {
        putc('0')
    } 

    array i8[22] 22+ dup i8(0) store -1+ `sb`

    while (dup u64(0) !=) {
        u64(10) divmod u64(48)+ as i8 
        `lb` rev store 
        `lb` -1+ `sb`
    } trash

    print(`lb`1+)

}

i32 atoi(ptr i8) {
    set string
    0
    while (get string load '0' >= get string load '9' <= &) {
        10* get string load '0'- as i32 +
        get string 1+ set string
    }
}

u64 atol(ptr i8) {
    set string
    u64(0)
    while (get string load '0' >= get string load '9' <= &) {
        u64(10)* get string load '0'- as u64 +
        get string 1+ set string
    }
}


i32 abs(i32) {
    if (dup 0 <) {`0r-`}
}

void _start() {
    
    open("input.q", 0, 0) set file
    array i8[65535] set buffer
    get buffer i8(48) store
    read(get file, get buffer, u64(65535)) as i32 set size
    #get buffer get size+ i8(10) store

    `0so`

    `100000` set trx `100000` set try
    `100000` set brx `0` set bry
    `0` set blx `0` set bly
    `0` set tlx `100000` set tly

    `0si`
    while (`li1+` get size < ) {
        atoi(buffer[`li`]) `sx`
        while (buffer[`li`] load ',' !=) {inc(i)} inc(i)

        atoi(buffer[`li`]) `sy`
        while (buffer[`li`] load i8(10) !=) {inc(i)} inc(i)

        `lxlyr` printnum ',' putc printnum i8(10) putc

        # if less than topright, then 
        if (`lxly+` get trx get try + <=) {
            `lxly` set try set trx
        } 
        # if y - x > br
        if (`lylx-` get bry get brx - >=) {
            `lxly` set bry set brx
        }
        # if more than bottom left
        if (`lxly+` get blx get bly+ >=) {
            `lxly` set bly set blx
        }
        # if x - y > tl
        if (`lxly-` get tlx get tly - >=) {
            `lxly` set tly set tlx
        }
 
    }

    print("tr: ")
    printnum(get trx) putc(',') printnum(get try) putc(i8(10))
    print("br: ")
    printnum(get brx) putc(',') printnum(get bry) putc(i8(10))
    print("bl: ")
    printnum(get blx) putc(',') printnum(get bly) putc(i8(10))
    print("tl: ")
    printnum(get tlx) putc(',') printnum(get tly) putc(i8(10))

    get blx get trx - `1+` as u64 get bly get try - `1+` as u64 * `s1`
    get tlx get brx - `1+` as u64 get bry get tly - `1+` as u64 * `s2`

    if (`l1l2`>) { 
        `l1`
    } else {
        `l2`
    }

    println("answer:")
    printnum64
    
    exit(0)
}

void main() {
    _start
}