H,W = map(int,input().split())
S =[list(input().split()) for i in range(H)]
c_dict = {0:"1",1:"2",2:"3",3:"4",4:"5",5:"6",6:"7",7:"8",8:"9",9:"10",10:"11",\
11:"12",12:"13",13:"14",14:"15",15:"16",16:"17",17:"18",18:"A",19:"B",20:"C",\
21:"D",22:"E",23:"F",24:"G",25:"H"}
l_dict = {0:"A",1:"B",2:"C",3:"D",4:"E",5:"F",6:"G",7:"H",8:"I",9:"J",10:"K",\
11:"L",12:"M",13:"N",14:"O",15:"P",16:"Q",17:"R",18:"S",19:"T",20:"U",21:"V",\
22:"W",23:"X",24:"Y",25:"Z"}
for i in range(H):
for j in range(W):
if S[i][j]=="snuke":
print(l_dict[j]+c_dict[i])
exit()