from __future__ import print_function
import fileinput as FI
import itertools as IT

INP =IT.chain(FI.input(), [""])

while True:
    line = INP.next()
    line = line.strip()
    if not line:
        break
    count=int(line)
    arr=[]
    linesets=[]
    columnsets=[]
    for i in range(count):
        li = INP.next().strip()
        arr.append(li)
        linesets.append(set(li))
    flag = True
    R = 0
    while linesets[R] == linesets[R+1]:
        R+=1
    R+=1 # this one is the wrong one!
    if R == 1: #determine, whether the first is bad or second
        R = 1 if linesets[0] == linesets[2] else 0
    #decide V
    #print(linesets[(R+1)%count], linesets[R], linesets[(R+1)%count] - linesets[R])
    #print(R,count, (R+1)%count)
    remeaning=linesets[(R+1)%count] - linesets[R]
    V=list(remeaning)[0]

    #decide C
    for i in range(count):
        columnsets.append(set([li[i] for li in arr]))
    C=0
    while columnsets[C] == columnsets[C+1]:
        C+=1
    C+=1 #this one is the wrong one
    if C == 1: #determine, whether the first is bad or second
        C = 1 if columnsets[0] == columnsets[2] else 0
    #print + transform from Pythonic indexing to tribune task indexing
    print("%d %d %s"%(R+1,C+1,V))