correction: 65, not 64❌
echo '065 097' | fold -w4 | awk '{ printf("%c\n",$0); }'
a
a

cs101 extra:
echo "=10;obase=2; 65" | bc
1000001
echo "=10;obase=2; 65+32" | bc
1100001

echo '(2^0)*1 + (2^1)*0 + (2^2)*0 + (2^3)*0 + (2^4)*0 + (2^5)*1 + (2^6)*1' | bc
97