#include <stdio.h>
 
int main(void) {
    //shift the array with length *len* *shift* bits to the left
    int len = 4, shift = 3;
    unsigned char a[] = "kxmo";
    unsigned char b[] = "    "; //X@hx
 
    int carry = 0, nextCarry;
    for(int i = len-1 ; i >= 0 ; i--) {
        nextCarry = (a[i] >> (8-shift)) & ((1<<(shift+1))-1);
        b[i] = (a[i] << shift) | carry;
        carry = nextCarry;
        printf("%x %x\n", a[i], b[i]);
    }
 
    return 0;
}
 

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