diff --git a/common/coords.go b/common/coords.go
index ed162aa..2ca3189 100644
--- a/common/coords.go
+++ b/common/coords.go
@@ -140,10 +140,22 @@ func TransformPlainToInterleaved(pos int64) int64 {
 	return CoordToInterleaved(PlainToCoord(pos))
 }
 
-func TransformInterleavedPlain(pos int64) int64 {
+func TransformInterleavedToPlain(pos int64) int64 {
 	return CoordToPlain(InterleavedToCoord(pos))
 }
 
+func DecodeStringFromBytesToInterleaved(key []byte) (v int64, err error) {
+	if v, err = DecodeStringFromBytes(key); err != nil {
+		return
+	}
+	v = TransformPlainToInterleaved(v)
+	return
+}
+
+func EncodeStringToBytesFromInterleaved(key int64) ([]byte, error) {
+	return EncodeStringToBytes(TransformInterleavedToPlain(key))
+}
+
 func SelectKeySplitter(interleaved bool) KeySplitter {
 	if interleaved {
 		return InterleavedToCoord