How many pairs of four-character idioms can these words form?

There is only one idiom:

When both sides are in a humble situation, help each other

Spelling: xiāng rú yǐ mò

Release: wet; Bubble: spit. The water is dry; Fish wet each other with saliva; to sustain life Now the metaphor is to help each other with meager strength in difficulties.

Out: "Zhuangzi Grand Master": "Spring Dry; Fish are on land; Cry to each other; Help each other; If you don't forget the rivers and lakes. "

Example: (1) difficult times; We can only help each other; ~; Pull through. (2) People at the bottom of society often help each other; ~.