#include <stdio.h>
#include <string.h>

struct {
    int offset;
    int length;
} info[] = {
    {0, 20},
    {20, 18},
    {38, 18},
    {56, -1},
    {-1, 0}
};

unsigned int get_int(char *s, int len)
{
    unsigned int ret = (unsigned int) (*s);
    if (len == 1)
        ret = (ret & 0xff);
    else
        ret = (((ret & 0xff) << ((len - 1) * 8)) | get_int(s + 1, len - 1));
    return ret;
}

void print_int(unsigned int val, int len)
{
    unsigned int v = val;
    if (len == 0)
        return;
    v >>= ((len - 1)* 8);
    printf("%x%x", (v >> 4) & 0xf, v & 0xf);
    print_int(val, len - 1);
}

int main()
{
    int iter = 0;
    unsigned int checksum = 0;

#if 0
    char input[1024];
    fgets(input, sizeof(input), stdin);
    input[strlen(input) - 1] = '\0';
#else
    /*char *input = "1.10ZXG10000HLRAGENT" "00000001DLGLGN0000" "00000001TXBEG 0000" "LOGIN:USER=ZXG10,PSWD=ZXG10 ";*/
    char *input = "1.10ZXG10000HLRAGENT0000001CDLGCONFFFF00000004TXBEG FFFFMOD SS:IMSI=470300200000014,CFU=1,CFB=1,CFNRY=1,CFNRC=1 ";
#endif
    for (iter = 0; info[iter].offset > -1; iter++) {
        int offset = info[iter].offset, end;
        int next = 4;
        for (end = 0; end < info[iter].length || (info[iter].length < 0 && input[offset + end]); end += next) {
            printf("%s: ", input + offset + end);
            if (info[iter].length > 0 && end + next > info[iter].length)
                next = info[iter].length - end;
            checksum ^= get_int(input + offset + end, next);
            print_int(checksum, 4);
            printf("\n");
        }
    }
    checksum = ~checksum;
    print_int(checksum, 4);
    printf("\n");
    printf("\n");
    return 0;
}