H,W=map(int,input().split())
l=['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z']
a=b=''
for i in range(H):
l2=list(map(str,input().split()))
for j in range(W):
if l2[j]=='snuke':
a=l[j]
b=str(i+1)
print(a+b)