zì zhǐ lǒu zi
see 字紙簍|字纸篓[zi4 zhi3 lou3]
字
zì
letter
纸
zhǐ
paper (CL:張|张[zhang1],沓[da2])
篓
lǒu
basket
子
zi
noun suffix, as in 椅子[yi3 zi5] "chair"