x, y = map(int, input().split(' '))
s = [[0 for i in range(y)] for j in range(x)]
for i in range(x):
s[i] = list(map(str, input().split(' ')))
c = ['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']
flag = False
for i in range(x):
if flag == False:
for j in range(y):
if s[i][j] == "snuke":
print(c[j], end="")
print(i+1)
flag = True
break