1 #include<cstdio>
 2 #include<cstring>
 3 #include<cmath>
 4 using namespace std;
 5 
 6 char key1[9][5]={" ","ABC","DEF","GHI","JKL","MNO","PQRS","TUV","WXYZ"};
 7 char key2[28]={" QWERTYUIOPASDFGHJKLZXCVBNM"};
 8 
 9 int main()
10 {
11     int i,j,k,t;
12     char s[1005];
13     char temp[1005];
14     char ans[1005];
15     while(scanf("%s",s)!=EOF)
16     {
17         int len=strlen(s);
18         for(j=0,i=0;i<len;i+=2)
19         temp[j++]=key1[s[i]-‘0‘-1][s[i+1]-‘0‘-1];
20         temp[j]=‘\0‘;
21         t=0;
22         for(i=0;i<j;i++)
23         {
24             for(k=1;k<27;k++)
25             if(temp[i]==key2[k])
26             ans[t++]=(char)(k+‘A‘-1);
27         }
28         ans[t]=‘\0‘;
29         for(j=0,i=ceil((double)t/2);i<t;i++)
30         temp[j++]=ans[i];
31         temp[j]=‘\0‘;
32         for(i=ceil((double)t/2)-1;i>0;i--)
33         ans[i*2]=ans[i];
34         for(j=0,i=1;i<t;i+=2)
35         ans[i]=temp[j++];
36         ans[t]==‘\0‘;
37         strrev(ans);
38         printf("%s\n",ans);
39     }
40     return 0;
41 }