#Decoder
#Team First Byte
#Last Updated: 3:43
fin=open("DATA2.txt", "r")
c=0
fout=open("OUT2.txt", "w")
while c<5:
    c=c+1
    num=fin.readline()

    numb=num[0:6]
    result=""
    
    last=len(str(num))
    lastl=num[last-1:last]
    
    
    import string
    
    
    i=-1
    digit=0
    digit2=0
    
    
    if len(str(digit))==1:
        while i<(len(numb)-1):
            i=i+1
            digit=digit+int(numb[i:i+1])
        if len(str(digit))>1: 
            i=-1
            
            digit=str(digit)
            digita = int(digit[0:1])
            digitb = int(digit[1:2])
            digit = digita + digitb
            
            digit=str(digit).replace("1", "A")
            digit=str(digit).replace("2", "B")
            digit=str(digit).replace("3", "C")
            digit=str(digit).replace("4", "D")
            digit=str(digit).replace("5", "E")
            digit=str(digit).replace("6", "F")
            digit=str(digit).replace("7", "G")
            digit=str(digit).replace("8", "H")
            digit=str(digit).replace("9", "I")
            digit=str(digit)
            
        
            while i<(len(str(digit))-1):
                i=i+1            
                digit2=str(digit2).replace("1", "A")
                digit2=str(digit2).replace("2", "B")
                digit2=str(digit2).replace("3", "C")
                digit2=str(digit2).replace("4", "D")
                digit2=str(digit2).replace("5", "E")
                digit2=str(digit2).replace("6", "F")
                digit2=str(digit2).replace("7", "G")
                digit2=str(digit2).replace("8", "H")
                digit2=str(digit2).replace("9", "I")
                digit2=str(digit2)
    if len(str(digit)) == 1:
        digit=str(digit).replace("1", "a")
        digit=str(digit).replace("2", "b")
        digit=str(digit).replace("3", "c")
        digit=str(digit).replace("4", "d")
        digit=str(digit).replace("5", "e")
        digit=str(digit).replace("6", "f")
        digit=str(digit).replace("7", "g")
        digit=str(digit).replace("8", "h")
        digit=str(digit).replace("9", "i")
        digit=str(digit)
    
    
    
    if digit.upper()==lastl:
        result="match\n"
    else:
        result="error\n"
        
      
    

    fout.write(result)
fout.close()