s=input()
c_e=0
c_w=0
for i in range(len(s)-2):
    if s[i]=='0' and s[i+1]=='0' and s[i+2]=='0':
        c_e=1
        break
    elif s[i]!='0' and s[i+1]!='0' and s[i+2]!='0':
        c_w=1
        break
if c_e==1:
    print('EAST')
elif c_w==1:
    print('WEST')
else:
    print('NA')